Basic Pre Algebra Intervention Program This 9 lesson Intervention Plan is designed to provide extra practice lessons and activities for students in Pre Algebra. The skills covered are basics that must be mastered in order to ensure success in Pre Algebra. These lessons are not meant to be 90 minute full class lessons (although some could be used that way and some might last that long). Intervention works best when students work in small, targeted groups with a teacher. This is a small piece of a larger, 35 lesson, full Pre Algebra Intervention Plan. Created by: Lindsay Perro ©2011 1 Basic Pre Algebra Intervention Program LESSON A B TOPIC Order of Operations No Calculator Order of Operations with Decimals No Calculator C PLAN Expanded Form No Calculator D Rules of Exponents No Calculator Warm-up A Notes on Order of Operations Order of Operations Notes & Practice Independent Practice Order of Operations Bingo – Students solve the problems independently. Bingo can be played if time permits. Exit ticket A Warm up B Decimal Operations Notes & Review Puzzle – with partners Exit Ticket B Warm up C Expanded Form Notes Independent Practice - Form is Important Worksheet Exit Ticket C Warm up D Review of Exponents – Exponents Practice Worksheet Rules of Exponents Notes & Practice Exponents Versa Tiles Activity - Independent (Must have Versa Tiles for students to use) E Review Expanded Form & Laws of Exponents No Calculator Exit Ticket D Warm up E Expanded Form with Decimals and Fractions Worksheet Exponents Matching Game Should be played like the game “Memory”. Exit Ticket E 2 LESSON F TOPIC Fractions, Decimals & Percents No Calculator G Percent of a Number H Proportions and Unit Rates I Proportions and Scale LESSON Warm up F Fractions, Decimals and Percents Guided Practice and Pairs Practice Silly Face Worksheet – Independent Practice Exit Ticket F Warm up G Percent of a Number Guided Practice Percent of a Number Coloring Sheet – Independent Practice Exit Ticket G Warm up H Proportions and Unit Rate Notes and Guided Practice Proportions and Unit Rate Coloring Sheet – Independent Practice Exit Ticket H Warm up I Candy Bar Scale/Proportions Activity Exit Ticket I 3 Name _____________ Warm Up A List as many words as you can that signal each operation. 1) Addition 2) Subtraction 3) Multiplication 4) Division Name ___KEY________ Warm Up A List as many words as you can that signal each operation. 1) Addition Sum, more than, increased, plus 3) Multiplication Of, product, per 2) Subtraction Less than, difference, decreased 4) Division Quotient, per, divided by/into 4 Lesson A Notes Give the students notes on the order of operations. Feel free to use PEMDAS, however stress to them that Multiplication and Division are done from left to right – same with Addition and Subtraction. Have them copy down the following graphic organizer, or have it copied for them. ORDER OF OPERATIONS PARENTHESIS EXPONENTS MULTIPLICATION ADDITION OR DIVISION OR SUBTRACTION 5 Lesson A Notes and Practice Name: _______________________________ Date: ______________ Order of Operations Notes & Practice P_____________________________ ( ) Remember E _____________________________ M/D___________________________ 3 x/÷ A/S____________________________ + / - Multiplication and Division are solved from left to right Addition and Subtraction are solved from left to right Solve each problem. Show your work for each step. EX. 10 − 2 x 3 10 – 6 4 1. 22 – 4 x 4 2. 30 – 20 ÷ 5 3. (15 – 6) ÷ 3 4. 35 – 12 ÷ 4 + 10 5. 10 x (8 – 4) 5. 6( 12 - 4 ) 7. 15 - 4 x 2 + 5 8. 45 – 3 x 10 6 9. 2×7−2×5 10. 2 + 3 (5 − 4) 11. 6 ÷ 2 + 3 × 5 12. 8 + 12 ÷ 2 x 3 13. 5 × 1 − 4 ÷ 2 14. 11 + 5 × 4 − 4 15. 24 ÷ 6 + 5 x 2 16. 45 ÷ 5 + (4 x 2) 17. 2 x 5 + 5 x 2 Bonus! (7 - 5 + 3 – 2) ÷ 3 + 4 x 8 ÷ 2 7 Name: _______KEY____________________ Date: ______________ Order of Operations Notes & Practice P______PARENTHESIS____________ ( ) Remember E ______EXPONENTS_____________ M/D_MULTIPLICATION / DIVISION___ 3 x/÷ A/S_ADDITION / SUBTRACTION _____ + / - Multiplication and Division are solved from left to right Addition and Subtraction are solved from left to right Solve each problem. Show your work for each step. a. 10 − 2 x 3 10 – 6 4 1. 22 – 4 x 4 22 – 16 6 2. 30 – 20 ÷ 5 30 - 4 26 3. (15 – 6) ÷ 3 9÷3 3 4. 35 – 12 ÷ 4 + 10 35 – 3 + 10 33 + 10 43 5. 10 x (8 – 4) 10 x 4 40 5. 6( 12 - 4 ) 6(8) 48 7. 15 - 4 x 2 + 5 15 – 8 + 5 7+5 12 8. 45 – 3 x 10 45 – 30 15 8 9. 2×7−2×5 14 – 2 x 5 14 – 10 4 10. 2 + 3 (5 − 4) 2 + 3(1) 2+3 5 11. 6 ÷ 2 + 3 × 5 3+3x5 3 + 15 18 12. 8 + 12 ÷ 2 x 3 8+6x3 8 + 18 26 13. 5 × 1 − 4 ÷ 2 5–4÷2 5–2 3 14. 11 + 5 × 4 − 4 11 + 20 – 4 31 – 4 27 15. 24 ÷ 6 + 5 x 2 4+5x2 4 + 10 14 16. 45 ÷ 5 + (4 x 2) 9 + (4 x 2) 9+8 17 17. 2 x 5 + 5 x 2 10 + 5 x 2 10 + 10 20 Bonus! (7 - 5 + 3 – 2) ÷ 3 + 4 x 8 ÷ 2 (2 + 3 – 2) ÷ 3 + 4 x 8 ÷ 2 (5 – 2) ÷ 3 + 4 x 8 ÷ 2 3÷3+4x8÷2 1+4x8÷2 1 + 32 ÷ 2 1 + 16 17 9 Lesson A Independent Practice / Game Name_______________________________________ Date _________________________ Order of Operations BINGO! Solve each problem. When you are finished, Bingo will be played! B I N G O 16 – 8 ÷ 2 x 4 16 ÷ 4 + 3 (9-7) 3(7-5+1) 5(3) - 3(4) 42 ÷ (5-3) 2 x 3 + 16 ÷ 4 27 ÷ 3 – 5 + 12 10 x 3+ 4 x 5 42 ÷ 7 + 8 - 6 5(8 - 4) 12 x 2 - (6 x 2) 13 - 5 2+2 81 ÷ 9 x 9 - 10 100 – 5 x 4 x 3 16 + 84 11 + 9 3(3) + 3 3(3) - 3 (12 - 3) x 2 6(5) - 3(5) 6(6) + 3 x 2 10 x 4 – 4 x 4 24 - 4(2) 7(4-3) 15 – 2 x 3 + 2 4(2) + 4 x 3 2(3 + 6) 2x3 (3 x 4 x 5) - 4(5) 3(4 + 2) 3x3 15(7 - 4) 2[2 + (10 - 4) ÷ 3] 10[ 3(1 + 4) - 6(2) ] 10 Name____________KEY______________________ Date ____________________________ Order of Operations BINGO! Solve each problem. When you are finished, Bingo will be played! B I N G O 16 – 8 ÷ 2 x 4 16 ÷ 4 + 3 (9 - 7) 3( 13 – 5 + 1) 7(3) - 3(4) 42 ÷ (5-3) 0 10 27 9 21 2 x 5 + 16 ÷ 4 27 ÷ 3 – 5 + 12 10 x 3+ 4 x 5 77 ÷ 7 + 8 – 6 5(8 - 4) 14 16 50 13 20 12 x 2 - (6 x 2) 13 - 5 2+2 81 ÷ 9 x 9 – 10 100 – 6 x 4 x 3 16 + 84 11 + 9 12 2 71 28 5 3(3) + 3 6(2) (12 - 3) x 2 6(5) - 3(5) 6(6) + 3 x 2 10 x 4 – 4 x 4 1 18 15 42 24 44 - 4(2) 7(4-3) 15 – 2 x 3 + 2 5(2) + 4 x 3 2(3 + 6) 2x3 36 7 11 22 3 (3 x 4 x 5) - 4(5) 5(4 + 2) 3+2 15(7 - 4) 2[2 + (10 - 4) ÷ 3] 10[ 3(1 + 4) - 6(2) ] 40 6 45 8 30 11 Name _____________ Exit Ticket A 1) 5 + 4 ( 3 – 1) 2) 3x3–4x2 3) 15 ÷ 5 x 3 + 2 4) 4 x 3+8 8÷2 Name ____ KEY _____ Exit Ticket A 1) 5 + 4 ( 3 – 1) 2) 3x3–4x2 13 3) 15 ÷ 5 x 3 + 2 11 1 4) 4 x 3+8 8÷2 5 12 Name _____________ Warm Up B Use < or > to make each statement true. 1) -6 -8 2) 3 -1 3) -17 -15 4) 0 -9 5) -100 2 6) -19 7) -3 -2 8) 3 -36 -3 Name ___ KEY _____ Warm Up B Use < or > to make each statement true. 1) -6 3) -17 5) -100 7) -3 2) 3 -1 > 4) 0 -9 > 2 < 6) -19 -2 < 8) 3 -8 > -15 < -3 6 > -3 > 13 Name _________________________ Lesson B Notes and Review DECIMAL OPERATIONS REVIEW Complete the following table about decimal rules. Put a check mark in the box to show a rule applies to the given operation. Adding Decimals Subtracting Decimals Multiplying Decimals Dividing Decimals Line up the decimals Drop down the decimal into your answer (Or Float it up) Count the number of decimal places for your answer Move the decimal so you have a whole number Practice! 1. 4.5 x 0.56 5. 22.3 x 4.6 2. 125 ÷ 0.5 6. 40.5 ÷ 1.5 3. 4.5 + 15 7. 162.234 + 19.2 4. 156.43 – 42.1 8. 5,124 – 10.75 14 Word Problems - Read each problem carefully. These are REAL LIFE situations – you need to know how to set up and solve each of these! 1. Morgan purchased $30.46 worth of groceries. She paid the cashier with a $50 bill. How much change should she receive? 2. Aileen worked 35.5 hours last week. She earns $7.75 per hour. How much money did she make last week? 3. Reggie has a piece of lumber that is 9 feet long. He needs to cut it into .75 foot sections. How many pieces will he have after he makes his cuts? 4. Aralynn is making a quilt. She has used 5.5 balls of yarn and will need 8 more. How many balls of yarn will she have used when she’s finished? 5. Coffee costs $3.59 per pound. How much would 5.7 pounds of coffee cost? 6. Carl ran the 100 meter dash in 15.454 seconds. Jeremy ran it in 16.05 seconds. How much faster did Carl run than Jeremy? 15 Name ________KEY_____________ DECIMAL OPERATIONS REVIEW Complete the following table about decimal rules. Put a check mark in the box to show a rule applies to the given operation. Adding Decimals Subtracting Decimals Multiplying Decimals Line up the decimals Drop down the decimal into your answer (Or Float it up) Count the number of decimal places for your answer Move the decimal so you have a whole number Dividing Decimals You can’t have a decimal divisor Practice! 1. 4.5 x 0.56 = 2.52 5. 22.3 x 4.6 = 102.58 2. 125 ÷ 0.5 = 250 6. 40.5 ÷ 1.5 = 27 3. 4.5 + 15 = 19.5 7. 162.234 + 19.2 = 181.434 4. 156.43 – 42.1 = 114.33 8. 5,124 – 10.75 = 5113.25 16 Word Problems - Read each problem carefully. These are REAL LIFE situations – you need to know how to set up and solve each of these! 1. Morgan purchased $30.46 worth of groceries. She paid the cashier with a $50 bill. How much change should she receive? $19.54 2. Aileen worked 35.5 hours last week. She earns $7.75 per hour. How much money did she make last week? $275.13 3. Reggie has a piece of lumber that is 9 feet long. He needs to cut it into .75 foot sections. How many pieces will he have after he makes his cuts? 12 pieces 4. Aralynn is making a quilt. She has used 5.5 balls of yarn and will need 8 more. How many balls of yarn will she have used when she’s finished? 13.5 balls of yarn 5. Coffee costs $3.59 per pound. How much would 5.7 pounds of coffee cost? $20.46 6. Carl ran the 100 meter dash in 15.454 seconds. Jeremy ran it in 16.05 seconds. How much faster did Carl run than Jeremy? .596 seconds 17 Lesson B Activity – Puzzle. Pre Cut! 4.05 6.72 3−1 3.1 x 8.3 – 4.7 21.03 3.5 + 2 x 3.8 11.1 0.8 13.3 ÷ 2.1 - 6 3.03 8+6.2+4 3 + 4.1 (9 – 3.5) 15.6 1.27 6[5.2 (4.1 – 3.6)] 13.15 15.2 – 4.1 ÷ 2 2.08 32 + 6 + 1.3 13 – (4.2 x 2.6) 8−2 25.55 0.86 3.1−2.3 𝑥 0.6 4÷2 14.096 6.1−4.3 6−4 14 ÷ 2.2 + 6 13. 1 14 – 6 + 3.5 (2 + 4.1 ÷ 2) 20.175 18 + (14 – 12) 3.5 + 2 – 1.2 4 + 8 (2.3 x 3.6) 70.24 1.56 3.9 ÷ 3 x 1.2 4.2736 5.2 – 1.1 + 3.3 7.4 7.48 2.2 (4 – 3 x 0.2) 4.1 + 6 ÷ 2 3.2−1.6 18.5 9.7 + 7.6 – 3 + 4.2 5.005 ( 4 – 3.5) 6 + 4 (5.5 x 8.7 – 2.8) ÷ 9 3.23 18 – 3 + 2 x 4 18 Name _____________ Exit Ticket B 1) 2.5 + 4 ( 5.5 – 0.5) 2) 3.2 x 3 – 4.1 x 2 3) 15.5 ÷ 5 x 0.3 + 2.5 4) 2.4 x 0.5 + 0.8 8.8 ÷ 4.4 Name ___ KEY ____ Exit Ticket B 1) 2.5 + 4 ( 5.5 – 0.5) 2) 3.2 x 3 – 4.1 x 2 22.5 3) 15.5 ÷ 5 x 0.3 + 2.5 3.43 1.4 4) 2.4 x 0.5 + 0.8 8.8 ÷ 4.4 1 19 Name _____________ Warm Up C 1) Order the following numbers from least to greatest. 2) Order the following numbers from least to greatest. 1 2 3 1 0.43, 0.5, 0.57, 0.202 , , , 5 3 8 4 3) Order the following numbers from greatest to least. 4) Order the following numbers from least to greatest. 1 1 3 3 , , , 3 3 5 10 0.5, , 0.35, 2 8 5 4 Name ___ KEY _____ Warm Up C 1) Order the following numbers from least to greatest. 0.43, 0.5, 0.57, 0.202 0.202, 0.43, 0.5, 0.57 2) Order the following numbers from least to greatest. 1 2 3 1 , , , 5 3 8 4 1 1 3 2 , , , 4) Order the following numbers from least to greatest. 5 4 8 3 3) Order the following numbers from greatest to least. 1 1 3 3 , , , 2 8 5 4 3 3 1 1 3 4 5 2 8 10 , , , 3 3 5 10 0.5, , 0.35, , 0.35, 0.5, 3 5 20 Lesson C Notes Name _____________________________________________ Date_______________________ Expanded Form Notes There are TWO different ways to write numbers in expanded form. One way is to use place value, and the other is to use fractions. You need to be familiar with both ways. Place Value Guided Practice Write 31.024 in expanded form. Step 1: Identify the place value of each number. The 3 is in the _______________ place. The 2 is in the _______________ place. The 1 is in the _______________ place. The 4 is in the _______________ place. Skip any zeros. Step 2: Multiply each number by the decimal for its place value. (3 x 10) + (1 x 1) + (2 x 0.01) + (4 x 0.001) Independent Practice Write 5.106 in expanded form. Step 1: Identify the place value of each number. The 5 is in the ________________ place. Skip any zeros. The 1 is in the _________________ place. The 6 is in the ________________ place. Step 2: Multiply each number by the decimal for its place value. Write 152.026 in expanded form. Write 25.0603 in expanded form. 21 Place Value Using Fractions Guided Practice Write 31.024 in expanded form. Step 1: Identify the place value of each number. The 3 is in the _______________ place. The 2 is in the _______________ place. The 1 is in the _______________ place. The 4 is in the _______________ place. Skip any zeros. Step 2: Multiply each number by the fraction for its place value. (3 x 10) + (1 x 1) + (2 x 𝟏 𝟏𝟎𝟎 ) + (4 x 𝟏 𝟏𝟎𝟎𝟎 ) Independent Practice Write 5.106 in expanded form. Step 1: Identify the place value of each number. The 5 is in the ________________ place. Skip any zeros. The 1 is in the _________________ place. The 6 is in the ________________ place. Step 2: Multiply each number by the fraction for its place value. Write 152.026 in expanded form. Write 25.0603 in expanded form. Bring it all together. Write each of the following numbers in expanded form using place value and fractions. Write 0.075 in expanded form. Write 120.005 in expanded form. 22 Name ___________KEY_____________________________ Date_______________________ Expanded Form Notes There are TWO different ways to write numbers in expanded form. One way is to use place value, and the other is to use fractions. You need to be familiar with both ways. Place Value Guided Practice Write 31.024 in expanded form. Step 1: Identify the place value of each number. The 3 is in the ___TENS______ place. The 2 is in the __HUNDREDTHS___ place. The 1 is in the ___ONES_______ place. The 4 is in the _THOUSANDTHS___ place. Skip any zeros. Step 2: Multiply each number by the decimal for its place value. (3 x 10) + (1 x 1) + (2 x 0.01) + (4 x 0.001) Independent Practice Write 5.106 in expanded form. Step 1: Identify the place value of each number. The 5 is in the ___ONES______ place. Skip any zeros. The 1 is in the ____TENTHS_______ place. The 6 is in the _THOUSANDTHS__ place. Step 2: Multiply each number by the decimal for its place value. ( 5 X 1) + ( 1 X 0.1) + ( 6 X .001) Write 152.026 in expanded form. (1 X 100) + (5 X 10) + (2 X 1) + (2 X .01) + (6 X .001) Write 25.0603 in expanded form. (2 X 10) + (5 X 1) + (6 X .01) + (3 X .0001) 23 Place Value Using Fractions Guided Practice Write 31.024 in expanded form. Step 1: Identify the place value of each number. The 3 is in the ___TENS______ place. The 2 is in the __HUNDREDTHS___ place. The 1 is in the ___ONES_______ place. The 4 is in the _THOUSANDTHS___ place. Skip any zeros. Step 2: Multiply each number by the fraction for its place value. (3 x 10) + (1 x 1) + (2 x 𝟏 𝟏𝟎𝟎 ) + (4 x 𝟏 𝟏𝟎𝟎𝟎 ) Independent Practice Write 5.106 in expanded form. Step 1: Identify the place value of each number. The 5 is in the ___ONES______ place. Skip any zeros. The 1 is in the ____TENTHS_______ place. The 6 is in the _THOUSANDTHS__ place. Step 2: Multiply each number by the fraction for its place value. 1 1 ( 5 X 1) + ( 1 X 10 ) + ( 6 X 1000 ) Write 152.026 in expanded form. Write 25.0603 in expanded form. 1 1 (1 X 100) + (5 X 10) + (2 X 1) + (2 X 100 ) + (6 X 1000 ) 1 1 (2 X 10) + (5 X 1) + (6 X 100 ) + (3 X . 10000 ) Bring it all together. Write each of the following numbers in expanded form using place value and fractions. Write 0.075 in expanded form. ( 7 X .01) + ( 5 X .001) 1 1 (7 X 100 ) + ( 5 X 1000 ) Write 120.005 in expanded form. (1 X 100) + (2 X 10) + ( 5 X .001) 1 (1 X 100) + ( 2 X 10) + ( 5 X 1000 ) 24 Lesson C Independent Practice Name __________________________________ Date ________________ Form Is Important Write the given decimal in standard form, and expanded form using decimals. Written Form Standard Form Expanded Form using Decimals EX: Three and fifteen hundredths 3.15 (3 x 1) + (1 x 0.1) + (5 x .01) Four and ninety three thousandths Eighty six hundredths One hundred twenty and four tenths Six and one thousandth One thousand four and sixteen hundredths Ninety and five tenths Complete the table by writing each decimal in the missing form. Written Form Standard Form Expanded Form using Decimals 142.06 (4 x 1,000) + (2 x 10) + (6 x 0.001) 3.07 1,006.08 (9 x 1) + (4 x .01) + (5 x .001) 700.007 (5 x 10,000) + (3 x 100) + (4 x .1) 25 Name __________KEY____________________ Date _________________ Form Is Important Write the given decimal in standard form, and expanded form using decimals. Written Form Standard Form Expanded Form using Decimals EX: Three and fifteen hundredths 3.15 (3 x 1) + (1 x 0.1) + (5 x .01) Four and ninety three thousandths 4.093 (4 x 1) + (9 x .01) + (3 x .001) Eighty six hundredths 0.86 (8 x .1) + (6 x .01) One hundred twenty and four tenths 124.4 (1 x 100) + ( 2 x 10) + (4 x 1) + (4 x .1) Six and one thousandth 6.001 (6 x 1) + (1 x .001) One thousand four and sixteen hundredths 1,004.16 (1 x 1,000) + (4 x 1) + (1 x .1) + (6 x .01) Ninety and five tenths 9.5 (9 x 1) + (5 x .1) Complete the table by writing each decimal in the missing form. Written Form Standard Form Expanded Form using Decimals One hundred forty two and six hundredths 142.06 (1 x 100) + (4 x 10) + (2 x 1) + (6 x .01) Four thousand twenty and six thousandths 4,020.006 (4 x 1,000) + (2 x 10) + (6 x 0.001) Three and seven hundredths 3.07 (3 x 1) + (7 x .01) One thousand six and eight hundredths 1,006.08 (1 x 1,000) + (6 x 1) + (8 x .01) Nine and forty five thousandths 9.045 (9 x 1) + (4 x .01) + (5 x .001) Seven hundred and seven thousandths 700.007 (7 x 100) + (7 x .001) Fifty thousand, three hundred and four tenths 50,300.4 (5 x 10,000) + (3 x 100) + (4 x .1) 26 Name _____________ Exit Ticket C 1) Write in expanded form using place value. 2) Write in expanded form using fractions. 2,002.004 5.276 3) Write in expanded form using place value. 4) Write in expanded form using fractions. 23.23 505.050 Name ____KEY_____ Exit Ticket C 1) Write in expanded form using place value. 2) Write in expanded form using fractions. 2,002.004 (2 x 1,000) + (2 x 1) + (4 x .001) 3) Write in expanded form using place value. 505.050 (5 x 100) + (5 x 1) + (5 x .01) 5.276 (5 x 1) + (2 x 1 10 ) + (7 x 1 100 ) + (6 x 1 1,000 ) 4) Write in expanded form using fractions. 23.23 (2 x 10) + (3 x 1) + (2 x 1 10 ) + (3 x 1 100 ) 27 Name _____________ Warm Up D 1) Simply. Write your answer as an exponent. 75 2) Simply. Write your answer as an exponent. 43 • 43 73 3) Simply. Write your answer as an exponent. 84 4) Simply. Write your answer as an exponent. 82 • 85 81 Name ___ KEY ______ Warm Up D 1) Simply. Write your answer as an exponent. 75 73 72 3) Simply. Write your answer as an exponent. 84 81 83 2) Simply. Write your answer as an exponent. 43 • 43 46 4) Simply. Write your answer as an exponent. 82 • 85 87 28 Lesson D Review Name ___________________________ Date ___________ Exponents Practice Fill in the missing parts of the table. Words Expanded Form Standard Form Three cubed 3•3•3 27 4•4•4•4 Six to the 2nd power Four squared Seven to the 4th power 2•2•2•2•2•2 Three to the 4th power Three squared plus 2 cubed 3•3+2•2•2 5•5•5+4•4 Two squared plus ten squared 2•2+6•6•6•6 29 Name _________KEY__________ Date ___________ Exponents Practice Fill in the missing parts of the table. Words Expanded Form Standard Form Three cubed 3•3•3 27 Four to the 4th power 4•4•4•4 256 Six to the 2nd power 6•6 36 Four squared 4•4 16 Seven to the 4th power 7•7•7•7 2,401 Two to the 6th power 2•2•2•2•2•2 64 Three to the 4th power 3•3•3•3 81 Three squared plus 2 cubed 3•3+2•2•2 17 Five cubed plus four squared 5•5•5+4•4 141 Two squared plus ten squared 2 • 2 + 10 • 10 104 Two squared plus six to the fourth power 2•2+6•6•6•6 1,300 30 Lesson D Notes Name _____________________________________________ Date_______________________ Rules of Exponents Notes Rule Definition Example What is an Exponent? An exponent tells us how many times we multiply a number by itself. We never multiply the base by the exponent! 8³ = 8 x 8 x 8 Product Rule When multiplying two powers that have the same base, you can add the exponents. 5³ x 5² = 53 + 2 = 55 Quotient Rule We can divide two powers with the same base by subtracting the exponents. Zero Rule Any nonzero number raised to the power of zero equals 1. (not 8 x 3) 97 95 = 97−5 = 92 𝑥0 = 1 Product Rule Let’s try some! Write each answer as an exponent. 1. 3³ x 3¹ 3. 45 x 45 2. 74 x 75 4. 𝑥 𝑚 • 𝑥 𝑛 31 Quotient Rule Let’s try some! Write each answer as an exponent. 1. 2. 36 3. 32 24 4. 21 BCR Practice 87 84 10 9 10 5 912 96 Part A: Reduce the given fraction. Write you answer as an exponent. Part B: Use what you know about the laws of exponents to explain why your answer is correct. Use words, numbers and/or symbols in your explanation. ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ 32 Name __________KEY_______________________________ Date_______________________ Rules of Exponents Notes Rule Definition Example What is an Exponent? An exponent tells us how many times we multiply a number by itself. We never multiply the base by the exponent! 8³ = 8 x 8 x 8 Product Rule When multiplying two powers that have the same base, you can add the exponents. 5³ x 5² = 53 + 2 = 55 Quotient Rule We can divide two powers with the same base by subtracting the exponents. Zero Rule Any nonzero number raised to the power of zero equals 1. (not 8 x 3) 97 95 = 97−5 = 92 𝑥0 = 1 Product Rule Let’s try some! Write each answer as an exponent. 1. 3³ x 3¹ 2. 74 x 75 34 79 3. 45 x 45 4. 𝑥 𝑚 • 𝑥 𝑛 410 𝑥 𝑚 +𝑛 33 Quotient Rule Let’s try some! Write each answer as an exponent. 1. 2. 36 32 24 21 = =2 BCR Practice 34 3. 3 4. 87 84 = 83 10 9 10 5 = 104 912 96 Part A: Reduce the given fraction. Write you answer as an exponent. 96 Part B: Use what you know about the laws of exponents to explain why your answer is correct. Use words, numbers and/or symbols in your explanation. ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ 34 Lesson D Independent Practice Name ___________________________________________ Date _____________________________ Exponents & Square Roots VersaTiles© Activity Solve each problem by following the given directions. Find your answer in the box below. Using the VersaTiles, place the problem number over the letter that corresponds to your answer below. WRITE YOUR ANSWER ON THIS SHEET AS WELL! Simplify. Write your answer using exponents. 98 ? 6 12 ? 1. 94 =9 2. 5 •5 =5 3. 5 ? 10 4 •4 =4 4. 75 = 7? 75 Write in standard form. 5. 53 6. 42 7. 33 8. 26 Simplify. 9. 225 81 10. 64 11. 12. 144 Answer Box A B 8 G C 125 H 5 D 4 I 15 E 1 J 9 F 12 K 27 64 L 18 16 35 Name ____________ KEY_______________________ Date _____________________________ Exponents & Square Roots VersaTiles© Activity Solve each problem by following the given directions. Find your answer in the box below. Using the VersaTiles, place the problem number over the letter that corresponds to your answer below. WRITE YOUR ANSWER ON THIS SHEET AS WELL! Simplify. Write your answer using exponents. 98 ? 6 12 ? 1. 94 =9 2. 5 •5 4 =5 18 3. 5 ? 10 4 •4 =4 5 4. 75 75 = 7? 0 Write in expanded form. 5. 53 6. 125 42 7. 16 33 8. 26 27 64 Simplify. 225 9. 15 81 10. 9 64 11. 8 12. 144 12 Answer Box 36 Name _____________ Exit Ticket D 1) Solve. 3 4 3) Simplify using exponents. 512 54 2) Write using exponents. 6•6•6•6 4) Simplify using exponents. 73 • 75 Name ____KEY_____ Exit Ticket D 1) Solve. 34 81 3) Simplify using exponents. 512 54 58 2) Write using exponents. 6•6•6•6 64 4) Simplify using exponents. 73 • 75 78 37 Name _____________ Warm Up E 5) Write in expanded form using place value. 6) Write in expanded form using fractions. 154.004 7) Solve. 203.704 8) Write using exponents. 5•5•5•5•5 4 4 Name ___ KEY ____ Warm Up E 1) Write in expanded form using place value. 154.004 2) Write in expanded form using fractions. 203.704 1 (1 x 100) + (5 x 10) + (4 x 1) + (4 x .001) (2 x 100) + (3 x 1) + (7 x 3) Solve. 4) Write using exponents. 5•5•5•5•5 4 4 256 10 ) + (4 x 1 1,000 ) 55 38 Lesson E Worksheet Name ____________________________________ Date ____________________________________ Expanded Form with Decimals and Fractions Use the digits in the given number to fill in the place value chart. Then write each number in expanded form using decimals and expanded form using fractions. Example: 305.047 hundreds Tens Ones • Tenths 100 10 1 .1 / 3 0 5 0 Hundredths 𝟏 𝟏𝟎 .01 / Thousandths 𝟏 .001 / 𝟏𝟎𝟎 4 𝟏 𝟏,𝟎𝟎𝟎 7 (3x100) + (5 x 1) + (4 x .01) + (7 x .001) (3x100) + (5 x 1) + (4 x 1 100 ) + (7 x 1 1,000 ) Your Turn! 48.65 hundreds Tens Ones 100 10 1 • Tenths .1 / 𝟏 𝟏𝟎 Hundredths .01 / 𝟏 𝟏𝟎𝟎 Thousandths .001 / 𝟏 𝟏,𝟎𝟎𝟎 75.08 hundreds Tens Ones 100 10 1 • Tenths .1 / 𝟏 𝟏𝟎 Hundredths .01 / 𝟏 𝟏𝟎𝟎 Thousandths .001 / 𝟏 𝟏,𝟎𝟎𝟎 39 Each number is given in expanded notation. Break it down by using the given table. Then write each number in standard form. Example: (5 x 10) + (4 x hundreds Tens Ones 100 10 1 𝟏 𝟏𝟎 • ) + (6 x Tenths .1 / 5 𝟏 𝟏,𝟎𝟎𝟎 ) Hundredths 𝟏 .01 / 𝟏𝟎 𝟏 𝟏𝟎𝟎 4 Thousandths .001 / 𝟏 𝟏,𝟎𝟎𝟎 6 Fill in the empty spaces with zeros. 50.406 Your Turn! (9 x 100) + (6 x hundreds Tens Ones 100 10 1 (8 x 𝟏 𝟏𝟎 Tens Ones 100 10 1 ) + (8 x 𝟏𝟎𝟎 • Tenths .1 / ) + (4 x hundreds 𝟏 • 𝟏 𝟏𝟎 𝟏 𝟏𝟎 ) + (5 x Tenths .1 / 𝟏 𝟏𝟎 𝟏 𝟏,𝟎𝟎𝟎 ) Hundredths 𝟏 .01 / 𝟏 𝟏,𝟎𝟎𝟎 𝟏𝟎𝟎 .001 / 𝟏 𝟏,𝟎𝟎𝟎 ) Hundredths .01 / Thousandths 𝟏 𝟏𝟎𝟎 Thousandths .001 / 𝟏 𝟏,𝟎𝟎𝟎 40 Independent Practice Write each number in expanded form using decimals. 1. 625.03 ____________________________________________________ 2. 100.005 ____________________________________________________ 3. 45.76 ____________________________________________________ 4. 190.405 ____________________________________________________ Write each number in expanded form using fractions. 5. 14.7 ____________________________________________________ 6. 1,000.506 ____________________________________________________ 7. 55.98 ____________________________________________________ 8. 210.006 ____________________________________________________ Write each number in standard form. 9. (5 x 10) + (9 x 10. (7 x 1 10 ) + (1 x 1 10 ) + (6 x 1 100 ) + (3 x 1 1,000 ) ______________________________ ) ______________________________ 1 1,000 11. (9 x 1,000) + (5 x 100) + (6 x 12. (2 x 100) + (9 x 10) + (3 x 1 10 1 100 ) ) + (4 x ______________________________ 1 100 ) ______________________________ 41 Name __________KEY_______________ Date ____________________________________ Expanded Form with Decimals and Fractions Use the digits in the given number to fill in the place value chart. Then write each number in expanded form using decimals and expanded form using fractions. Example: 305.047 hundreds Tens Ones • Tenths 100 10 1 .1 / 3 0 5 0 𝟏 𝟏𝟎 Hundredths 𝟏 .01 / 𝟏𝟎𝟎 4 Thousandths .001 / 𝟏 𝟏,𝟎𝟎𝟎 7 (3x100) + (5 x 1) + (4 x .01) + (7 x .001) (3x100) + (5 x 1) + (4 x 1 100 ) + (7 x 1 1,000 ) Your Turn! 48.65 hundreds Tens Ones • Tenths 100 10 1 .1 / 4 8 6 𝟏 𝟏𝟎 Hundredths .01 / 𝟏 𝟏𝟎𝟎 Thousandths .001 / 𝟏 𝟏,𝟎𝟎𝟎 5 ( 4 x 10 ) + ( 8 x 1 ) + ( 6 x 𝟎. 𝟏 ) + ( 5 x 𝟎. 𝟎𝟏) 𝟏 𝟏 ( 4 x 10 ) + ( 8 x 1 ) + ( 6 x 𝟏𝟎 ) + ( 5 x 𝟏𝟎𝟎) 75.08 hundreds Tens Ones 100 10 1 7 5 • Tenths .1 / 𝟏 𝟏𝟎 Hundredths .01 / 𝟏 𝟏𝟎𝟎 Thousandths .001 / 𝟏 𝟏,𝟎𝟎𝟎 8 ( 7 x 10 ) + ( 5 x 1 ) + ( 8 x 𝟎. 𝟎𝟏) 𝟏 ( 7 x 10 ) + ( 5 x 1 ) + ( 8 x ) 𝟏𝟎𝟎 42 Each number is given in expanded notation. Break it down by using the given table. Then write each number in standard form. Example: (5 x 10) + (4 x hundreds Tens Ones 100 10 1 𝟏 𝟏𝟎 • ) + (6 x Tenths .1 / 5 𝟏 𝟏,𝟎𝟎𝟎 ) Hundredths 𝟏 .01 / 𝟏𝟎 𝟏 𝟏𝟎𝟎 4 Thousandths .001 / 𝟏 𝟏,𝟎𝟎𝟎 6 Fill in the empty spaces with zeros. 50.406 Your Turn! (9 x 100) + (6 x hundreds Tens Ones 100 10 1 𝟏 ) + (8 x 𝟏𝟎𝟎 • Tenths .1 / 𝟏 𝟏𝟎 𝟏 𝟏,𝟎𝟎𝟎 ) Hundredths 𝟏 .01 / 9 𝟏𝟎𝟎 6 Thousandths .001 / 𝟏 𝟏,𝟎𝟎𝟎 8 900.068 (8 x 𝟏 𝟏𝟎 ) + (4 x hundreds Tens Ones 100 10 1 8 • 𝟏 𝟏𝟎 ) + (5 x Tenths .1 / 4 𝟏 𝟏𝟎 𝟏 𝟏,𝟎𝟎𝟎 ) Hundredths .01 / 𝟏 𝟏𝟎𝟎 Thousandths .001 / 𝟏 𝟏,𝟎𝟎𝟎 5 80.405 43 Independent Practice Write each number in expanded form using decimals. 1. 625.03 ( 6 x 100) + ( 2 x 10) + ( 5 x 1 ) + ( 3 x .01) 2. 100.005 ( 1 x 100) + ( 5 x .001) 3. 45.76 ( 4 x 10) + ( 5 x 1) + ( 7 x .1 ) + ( 6 x .01) 4. 190.405 ( 1 x 100) + ( 9 x 10) + ( 4 x .1 ) + ( 5 x .001) Write each number in expanded form using fractions. 𝟏 5. 14.7 ( 1 x 10 ) + ( 4 x 1 ) + ( 7 x 6. 1,000.506 ( 1 x 1,000 ) + ( 5 x 7. 55.98 ( 5 x 10 ) + ( 5 x 1 ) + ( 9 x 8. 210.006 ( 2 x 100 ) + ( 1 x 10 ) + ( 6 x 𝟏 𝟏𝟎 𝟏𝟎 ) )+(6x 𝟏 𝟏𝟎 𝟏 𝟏,𝟎𝟎𝟎 ) )+(8x 𝟏 𝟏,𝟎𝟎𝟎 𝟏 𝟏𝟎𝟎 ) ) Write each number in standard form. 9. (5 x 10) + (9 x 10. (7 x 1 10 ) + (1 x 1 10 ) + (6 x 1 100 ) + (3 x 1 1,000 ) 50.906 ) 0.713 1 1,000 11. (9 x 1,000) + (5 x 100) + (6 x 12. (2 x 100) + (9 x 10) + (3 x 1 10 1 100 ) ) + (4 x 9,500.06 1 100 ) 290.34 44 Lesson E Worksheet Rules of Exponents Memory Pre -cut the cards. To ensure students cannot see through the back, print on cardstock or darker paper. 𝟖𝟔 𝟖𝟐 𝟖𝟏𝟔 𝟖𝟒 𝟖 𝟖𝟏𝟐 𝟖𝟐 • 𝟖𝟏 𝟖𝟑 𝟖𝟑 • 𝟖𝟎 • 𝟖𝟒 𝟖𝟕 𝟖𝟓 𝟖𝟓 1 𝟖𝟗 𝟖𝟑 𝟖𝟔 𝟖𝟐 • 𝟖𝟐 • 𝟖𝟒 𝟖𝟖 𝟖𝟏 • 𝟖 𝟏 𝟖𝟐 𝟖𝟏𝟎 𝟖𝟓 𝟖𝟓 𝟖𝟏𝟐 𝟖𝟐 𝟖 𝟒 𝟏𝟎 45 Name _____________ Exit Ticket E 1) Write in expanded form using place value. 2) Write in expanded form using fractions. 200.06 7.007 3) Simplify using exponents. 615 65 4) Simplify using exponents. 31 • 32 • 33 • 34 Name ___ KEY ____ Exit Ticket E 1) Write in expanded form using place value. 200.06 (2 x 100) + (6 x .001) 3) Simplify using exponents. 615 65 610 2) Write in expanded form using fractions. 7.007 (7 x 1) + (7 x 1 1,000 ) 4) Simplify using exponents. 31 • 32 • 33 • 34 310 46 Name _____________ Warm Up F 1) Put the following numbers in order from least to greatest. 1 3 1 , , 0.04, 3% 4 __________________________________ Use what you know about rational numbers to explain how you found your answer. Use words, numbers, and/or symbols in your explanation. _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _____________________________________________________ Name ___ KEY ___ Warm Up F 1) Put the following numbers in order from least to greatest. 1 3 1 , , 0.04, 3% 4 1 1 4 3 3% , 0.04 , , Use what you know about rational numbers to explain how you found your answer. Use words, numbers, and/or symbols in your explanation. Students should demonstrate their ability to convert the four numbers to all be in the same form, and then compare them. They can show their work in this section to get credit if they wish and if all work is shown. 47 Lesson F Guided & Group Practice Name __________________________________ Date _____________ Fractions, Decimals and Percents Use the chart below to help you convert among fractions, decimals and percents. You will need this to change and compare these three forms of numbers! 48 Use the chart to help you complete the following problems. 2 2 1. The annual amount of rainfall in a given city is 35 inches. Convert 35 to a 5 5 decimal. 2. Put the following numbers in order from least to greatest. 1 , 0.202 , 30% 4 3. You scored an 80% on your math test. Express this number as a fraction and as a decimal. 4. A new car loan comes with a 3.49% interest rate. Express this number as a decimal. 5. Which number has the greatest value? 3 , 0.35 , 35% , 5 5 15 49 Directions: Cut up the cards before giving them to students. The students (working individually or with partners) will pick 5 cards from the pile. They must use a white board or sheet of paper to order the numbers from least to greatest. If they are working with a partner, they must both agree on the answer before they can pick 5 more cards. 1 2 3 4 3 5 1 5 7 8 3 8 2 5 1 4 1 3 2 3 1 8 5 8 0.2 0.55 0.85 0.18 0.5 0.33 0.45 0.13 50 0.9 0.16 0.12 0.75 50% 95% 15% 4.5% 72% 41% 5% 7.5% 55% 10% 0.67 0.8 0.26 3 10 7 10 1 10 51 Lesson F Independent Practice 52 53 Lesson F Exit Ticket Name ______________________________ Exit Ticket F SHOW YOUR WORK! 1. In Megan’s Science class there are 35 students. Fourteen are girls. What is the ratio of girls to boys? 2. The ratio of number of cats to dogs in the pound was 12:36. How is this ratio represented as a fraction in simplest form? 3. On a day it snowed, three-tenths of the students wore snow boots. Write a ratio to represent the number of students who did wear boots compared to the number of students who did not. 4. Which of the following does not represent 75%? A. 1 75 B. 0.75 5. Carleigh took a survey of the students in her art class to see what their 15 favorite color was. 25 students chose 150 C. 200 D. 6. Rewrite 0.15 as a fraction in simplest form. 15 blue. What is 25 written as a percent? 54 Name _________KEY_______________ Exit Ticket F SHOW YOUR WORK! 1. In Megan’s Science class there are 35 students. Fourteen are girls. What is the ratio of girls to boys? 2. The ratio of number of cats to dogs in the pound was 12:36. How is this ratio represented as a fraction in simplest form? 14 : 21 Reduced to 2:3 3. On a day it snowed, three-tenths of the students wore snow boots. Write a ratio to represent the number of students who did wear boots compared to the number of students who did not. 1 3 4. Which of the following does not represent 75%? 1 𝐴. 75 150 C. 200 B. 0.75 D. 3:7 5. Carleigh took a survey of the students in her art class to see what their 15 favorite color was. 25 students chose 6. Rewrite 0.15 as a fraction in simplest form. 15 blue. What is 25 written as a percent? 3 20 60% 55 Name _____________ Warm Up G 1) Re-write as a decimal and a percent. 3 5 2) Re-write as a fraction and a percent. 3) Re-write as a decimal and a fraction. 5% 4) Re-write as a fraction in simplest form. 0.03 125 200 Name ___ KEY ______ Warm Up G 1) Re-write as a decimal and a percent. 3 5 0.6 60% 3) Re-write as a decimal and a fraction. 5% 0.05 5 100 2) Re-write as a fraction and a percent. 0.03 3 3% 100 4) Re-write as a fraction in simplest form. 125 200 5 8 56 Lesson G Notes and Practice Name _________________________________________ Date _______________________ Percent of a Number Guided Practice To determine the percent of a number you need to remember two key points: 1) The word “of” means Multiply! 2) Percents must be changed to decimals before you can multiply with them. Example: What is 70% of 150? Step 1: Change the percent to a decimal by moving the decimal two places to the left. Remember, the decimal in a whole number is at the end – just like a period is at the end of a sentence. 70% = 0.70 Step 2: Multiply the percent (which is now a decimal) by the given number. 0.70 x 150 105 Try these: What is 40% of 120? Step 1: Change the percent to a decimal by moving the decimal two places to the left. Remember, the decimal in a whole number is at the end – just like a period is at the end of a sentence. 40% = _________ Step 2: Multiply the percent (which is now a decimal) by the given number. _______ x _______ _______ What is 60% of 70? Step 1: Change the percent to a decimal by moving the decimal two places to the left. Remember, the decimal in a whole number is at the end – just like a period is at the end of a sentence. 60% = _________ Step 2: Multiply the percent (which is now a decimal) by the given number. _______ x _______ _______ 57 On Your Own: 1) What is 30% of 250? _________________________ = ___________________ Show your work here! 2) What is 40% of 55? _________________________ = ___________________ Show your work here! 3) What is 10% of 780? _________________________ = ___________________ Show your work here! 4) What is 20% of 1,300? _________________________ = ___________________ Show your work here! 5) What is 90% of 800? _________________________ = ___________________ Show your work here! 6) The Smith family went out to dinner and received great service. They decided to leave a 20% tip for their waitress. If their dinner bill totaled $90, how much was the tip? Think: You need to find what percent of what number? Show your work! 7) Carlos just took a 40 question math test. He scored a 75%. How many questions did he get correct on his test? Show your work! 8) Marge ordered $320 worth of photographs from a website. She has to pay a 10% shipping and handling fee. How much will the fee cost her? Show your work! 9) April made $440 in tips last night waitressing. She had to give 20% of her tips to the boys who clean the tables. How much money did she have to give them? Show your work! 10) You purchase a $1,500 television. You have to pay 6% sales tax. How much will the tax be on your new television? Show your work! 58 Name _________KEY___________________________ Date _______________________ Percent of a Number Guided Practice To determine the percent of a number you need to remember two key points: 3) The word “of” means Multiply! 4) Percents must be changed to decimals before you can multiply with them. Example: What is 70% of 150? Step 1: Change the percent to a decimal by moving the decimal two places to the left. Remember, the decimal in a whole number is at the end – just like a period is at the end of a sentence. 70% = 0.70 Step 2: Multiply the percent (which is now a decimal) by the given number. 0.70 x 150 105 Try these: What is 40% of 120? Step 1: Change the percent to a decimal by moving the decimal two places to the left. Remember, the decimal in a whole number is at the end – just like a period is at the end of a sentence. 40% = 0.40 Step 2: Multiply the percent (which is now a decimal) by the given number. 0.40 x 120 48 What is 60% of 70? Step 1: Change the percent to a decimal by moving the decimal two places to the left. Remember, the decimal in a whole number is at the end – just like a period is at the end of a sentence. 60% = 0.60 Step 2: Multiply the percent (which is now a decimal) by the given number. 0.60 x 70 42 59 On Your Own: 1) What is 30% of 250? ______0.30 x 250_______ = _____75_______ Show your work here! 2) What is 40% of 55? ______0.40 x 55_______ = _____22_______ Show your work here! 3) What is 10% of 780? ______0.10 x 780_______ = _____78_______ Show your work here! 4) What is 20% of 1,300? ______0.20 x 1,300_______ = _____260_______ Show your work here! 5) What is 90% of 800? ______0.90 x 800_______ = _____720_______ Show your work here! 6) The Smith family went out to dinner and received great service. They decided to leave a 20% tip for their waitress. If their dinner bill totaled $90, how much was the tip? Think: You need to find what percent of what number? Show your work! 0.20 x 90 $18 tip 7) Carlos just took a 40 question math test. He scored a 75%. How many questions did he get correct on his test? Show your work! 0.75 x 40 30 questions correct 8) Marge ordered $320 worth of photographs from a website. She has to pay a 10% shipping and handling fee. How much will the fee cost her? Show your work! 0.10 x 320 $32 fee 9) April made $440 in tips last night waitressing. She had to give 20% of her tips to the boys who clean the tables. How much money did she have to give them? Show your work! 0.20 x 440 $88 10) You purchase a $1,500 television. You have to pay 6% sales tax. How much will the tax be on your new television? Show your work! 0.06 x 1,500 $90 sales tax 60 Lesson G Independent Practice Name _____________________________________ Date__________________ Percent of a Number Solve each problem. Find your answer in one of the two answer boxes. Find the problem number on the coloring page and color each section with the number the color that corresponds to your answer. # Problem Answer 1 Answer 2 Answer 3 1 What is 10% of 47? 470 DARK GREEN 2 What is 20% of 82? 16.4 BLACK 4.7 LIGHT GREEN 62 ORANGE 3 What is 150% of 50? 7.5 ORANGE 100 RED 75 YELLOW 4 What is 50% of 30? 15 ORANGE 80 YELLOW 60 RED 5 What is 10% of 9? 90 PINK 19 PURPLE 0.9 RED 6 A $400 TV is on sale for 25% off. What is the sale price of the TV? $100 GREEN $300 BLUE $375 YELLOW 7 A $65 purse is on sale for 10% off. How much money will you save if you buy it? $55.00 BLACK $10.00 RED $6.50 DARK GREEN 8 The cost of a movie ticket increased by 15%. The old price was $8. How much are they now? $23.00 LIGHT BLUE $9.20 GRAY $9.50 PINK 9 A $75 jacket is 50% off. How much does the jacket cost now? $37.50 PURPLE $40.00 GREEN $25.00 RED 10 You leave a 20% tip on your $70 dinner bill. How much was the tip? $5.00 ORANGE $14.00 PINK $90.00 YELLOW 37 YELLOW 164 BLUE 61 62 Name __________KEY_______________________ Date__________________ Percent of a Number Solve each problem. Find your answer in one of the two answer boxes. Find the problem number on the coloring page and color each section with the number the color that corresponds to your answer. # Problem Answer 1 Answer 2 Answer 3 1 What is 10% of 47? 470 DARK GREEN 2 What is 20% of 82? 16.4 BLACK 4.7 LIGHT GREEN 62 ORANGE 3 What is 150% of 50? 7.5 ORANGE 100 RED 75 YELLOW 4 What is 50% of 30? 15 ORANGE 80 YELLOW 60 RED 5 What is 10% of 9? 90 PINK 19 PURPLE 0.9 RED 6 A $400 TV is on sale for 25% off. What is the sale price of the TV? $100 GREEN $300 BLUE $375 YELLOW 7 A $65 purse is on sale for 10% off. How much money will you save if you buy it? $55.00 BLACK $10.00 RED $6.50 DARK GREEN 8 The cost of a movie ticket increased by 15%. The old price was $8. How much are they now? $23.00 LIGHT BLUE $9.20 GRAY $9.50 PINK 9 A $75 jacket is 50% off. How much does the jacket cost now? $37.50 PURPLE $40.00 GREEN $25.00 RED 10 You leave a 20% tip on your $70 dinner bill. How much was the tip? $5.00 ORANGE $14.00 PINK $90.00 YELLOW 37 YELLOW 164 BLUE 63 Name ______________________________ Exit Ticket G SHOW YOUR WORK! 1. Daniel is shopping for a new TV. He found one on sale for 25% off the original price, which is $650. Write an expression (don’t solve it) to find out how much money he saved. 2. Corrine ordered a $120 couch and needs to pay a 10% shipping charge. How much will the shipping charge be? 3. Stephanie’s test score was 50% lower than Jonathan’s. If Jonathan scored a 96 on his test, what did Stephanie score? 4. Amber’s soccer team has scored 40 goals this season. Amber scored 10% of the goals by herself. How many goals has she scored? 5. Heather is reading a 450 page book. She is 10% finished with the book. How many pages has she read? 6. Kevin is jogging 20 miles today. He is 25% finished. How many miles has he completed? 64 Name _______KEY___________________ Exit Ticket G SHOW YOUR WORK! 1. Daniel is shopping for a new TV. He found one on sale for 25% off the original price, which is $650. Write an expression (don’t solve it) to find out how much money he saved. 2. Corrine ordered a $120 couch and needs to pay a 10% shipping charge. How much will the shipping charge be? $12 650 x 0.25 3. Stephanie’s test score was 50% lower than Jonathan’s. If Jonathan scored a 96 on his test, what did Stephanie score? 4. Amber’s soccer team has scored 40 goals this season. Amber scored 10% of the goals by herself. How many goals has she scored? 4 goals 48 5. Heather is reading a 450 page book. She is 10% finished with the book. How many pages has she read? 45 pages 6. Kevin is jogging 20 miles today. He is 25% finished. How many miles has he completed? 5 miles 65 Name _____________ Warm Up H 1) You just purchased a $150 television. The sales tax is 6%. How much will you pay in sales tax? 3) You are planning to go to a theme park. Admission is $45. You have a coupon for 10% off your admission fee. How much money will you save by using the coupon? 2) How much will you pay all together for the television in problem #1? 4) What will your new cost of admission be in problem #3? Name ____KEY______ Warm Up H 1) You just purchased a $150 television. The sales tax is 6%. How much will you pay in sales tax? $9.00 3) You are planning to go to a theme park. Admission is $45. You have a coupon for 10% off your admission fee. How much money will you save by using the coupon? $4.50 2) How much will you pay all together for the television in problem #1? $159.00 4) What will your new cost of admission be in problem #3? $41.50 66 Lesson H Notes and Practice Name ______________________________________ Date _____________________________ Proportions and Unit Rate PROPORTIONS NOTES When setting up a proportion, first decide what two units you are comparing – miles to minutes, degrees to hours, etc. o Write your units as a proportion of their own. Example: You just traveled 40 miles in 30 minutes. How far will you travel in 45 minutes? We are comparing miles to minutes, therefore: 𝒎𝒊𝒍𝒆𝒔 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 o Usually you will be given a ratio in the problem. Above we are told “You just traveled 40 miles in 30 minutes”. This can be written as a ratio. Be sure to set it up the same was as the unit ratio. 𝒎𝒊𝒍𝒆𝒔 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 = 𝟒𝟎 𝒎𝒊𝒍𝒆𝒔 𝟑𝟎 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 o Next, look at the information you have left in the problem, and look to see WHAT you are trying to find. We want to find out how far we will travel in 45 minutes. We know two things: 1. We are trying to find out how far (distance – miles) 2. We know the minutes, 45. Substitute what you KNOW into the proportion. Since we know the minutes, we must make sure to put the 45 on the bottom of the fraction bar. 𝒎𝒊𝒍𝒆𝒔 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 = 𝟒𝟎 𝒎𝒊𝒍𝒆𝒔 𝟑𝟎 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 = 𝑵 𝒎𝒊𝒍𝒆𝒔 𝟒𝟓 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 To solve the proportion you cross multiply, and divide. 𝟒𝟎 𝒎𝒊𝒍𝒆𝒔 𝟑𝟎 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 = 𝑵 𝒎𝒊𝒍𝒆𝒔 𝟒𝟓 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 o Multiply the 30 and N to get 30•N, and multiply the 40 and 45 to get 40•45. Set this up as an equation. o 30•N = 40•45 Solve as you would a regular equation o 30•N = 1,800 30 30 o N = 60 miles 67 Guided Practice You just paid $30 for 12 gallons of gas. How much will it cost you to get an additional 4 gallons of gas? o We are comparing cost to gallons. Write this as it’s own ratio. o We know we paid $30 for 12 gallons. Write this as a ratio, set equal to the ratio from above. o We know we are looking for the cost of 4 gallons. Write this as a ratio set equal to the proportion you just wrote above. o Now cross multiply and solve! Independent Practice 1. It takes you 25 minutes to drive the 35 miles from school to your house. How long will it take you to drive the 70 miles from your house to the beach – if you travel at the same rate of speed? SHOW YOUR WORK! 2. You used 4 cups of chocolate chips to bake 90 batches of cookies. How many cups do you need if you are planning to only bake 112.5 batches of cookies? SHOW YOUR WORK! 68 UNIT RATE NOTES: Determining Unit Rate is nothing more than finding the cost/mileage/etc. for ONE unit. o Most unit rate questions will be given you information for more than one thing. Example: You can purchase 6 boxes of tissues for $15. How much does each box cost? o Write the information you have been given as a ratio. 𝟔 𝒃𝒐𝒙𝒆𝒔 $𝟏𝟓 o Next, set up a proportion to determine the cost of just one box of tissues. Don’t forget to write a ratio using words first. We are comparing boxes to cost. 𝒃𝒐𝒙𝒆𝒔 𝒄𝒐𝒔𝒕 = 𝟔 𝒃𝒐𝒙𝒆𝒔 $𝟏𝟓 = 𝟏 𝒃𝒐𝒙 $𝑵 o To solve the proportion you cross multiply, and divide. 𝟔 𝒃𝒐𝒙𝒆𝒔 $𝟏𝟓 = 𝟏 𝒃𝒐𝒙 $𝑵 o Multiply the 6 and N to get 6•N, and multiply the 15 and 1 to get 15•1. Set this up as an equation. o 6•N = 15•1 Solve as you would a regular equation o 6•N = 15 6 6 o N = $2.50 o You will see that you end up dividing the cost by the number of units. When you get better at finding unit rate, you can solve that way. Guided Practice You just paid $45 for 12 gallons of gas. How much did each gallon of gas cost you? o You paid $45 for 12 gallons of gas. Write this as a ratio. $𝟒𝟓 𝟏𝟐 𝒈𝒂𝒍𝒍𝒐𝒏𝒔 o We want to find the cost of ONE gallon. We write this as another ratio. 𝒄𝒐𝒔𝒕 $𝟒𝟓 $𝑵 = = 𝒈𝒂𝒍𝒍𝒐𝒏𝒔 𝟏𝟐 𝒈𝒂𝒍𝒍𝒐𝒏𝒔 𝟏 𝒈𝒂𝒍𝒍𝒐𝒏𝒔 o Now cross multiply and solve! 12•N = 45•1 12•N = 45 12 12 N = $3.75 69 INDEPENDENT PRACTICE 1. A pack of 5 books costs $18.75. A pack of 3 books $12.75. Which pack has the lowest cost per book? (hint – find the unit rate for each pack, then compare) SHOW YOUR WORK! 2. You found CDs on sale! Eight CDs would cost you $79.92. What is the cost per CD? SHOW YOUR WORK! 3. You have the option of buying 20 tickets at the fair for $15 or 45 tickets for $27. Which is the best deal? SHOW YOUR WORK! 4. You can buy 30 cans of soda for $6. What is the cost per can? SHOW YOUR WORK! 70 Name __________KEY_________________ Date _____________________________ Proportions and Unit Rate PROPORTIONS NOTES When setting up a proportion, first decide what two units you are comparing – miles to minutes, degrees to hours, etc. o Write your units as a proportion of their own. Example: You just traveled 40 miles in 30 minutes. How far will you travel in 45 minutes? We are comparing miles to minutes, therefore: 𝒎𝒊𝒍𝒆𝒔 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 o Usually you will be given a ratio in the problem. Above we are told “You just traveled 40 miles in 30 minutes”. This can be written as a ratio. Be sure to set it up the same was as the unit ratio. 𝒎𝒊𝒍𝒆𝒔 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 = 𝟒𝟎 𝒎𝒊𝒍𝒆𝒔 𝟑𝟎 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 o Next, look at the information you have left in the problem, and look to see WHAT you are trying to find. We want to find out how far we will travel in 45 minutes. We know two things: 3. We are trying to find out how far (distance – miles) 4. We know the minutes, 45. Substitute what you KNOW into the proportion. Since we know the minutes, we must make sure to put the 45 on the bottom of the fraction bar. 𝒎𝒊𝒍𝒆𝒔 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 = 𝟒𝟎 𝒎𝒊𝒍𝒆𝒔 𝟑𝟎 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 = 𝑵 𝒎𝒊𝒍𝒆𝒔 𝟒𝟓 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 To solve the proportion you cross multiply, and divide. 𝟒𝟎 𝒎𝒊𝒍𝒆𝒔 𝟑𝟎 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 = 𝑵 𝒎𝒊𝒍𝒆𝒔 𝟒𝟓 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 o Multiply the 30 and N to get 30•N, and multiply the 40 and 45 to get 40•45. Set this up as an equation. o 30•N = 40•45 Solve as you would a regular equation o 30•N = 1,800 30 30 o N = 60 miles 71 Guided Practice You just paid $30 for 12 gallons of gas. How much will it cost you to get an additional 4 gallons of gas? o We are comparing cost to gallons. Write this as it’s own ratio. 𝒄𝒐𝒔𝒕 𝒈𝒂𝒍𝒍𝒐𝒏𝒔 o We know we paid $30 for 12 gallons. Write this as a ratio, set equal to the ratio from above. 𝒄𝒐𝒔𝒕 $𝟑𝟎 = 𝒈𝒂𝒍𝒍𝒐𝒏𝒔 𝟏𝟐 𝒈𝒂𝒍𝒍𝒐𝒏𝒔 o We know we are looking for the cost of 4 gallons. Write this as a ratio set equal to the proportion you just wrote above. 𝒄𝒐𝒔𝒕 $𝟑𝟎 𝑵 𝒄𝒐𝒔𝒕 = = 𝒈𝒂𝒍𝒍𝒐𝒏𝒔 𝟏𝟐 𝒈𝒂𝒍𝒍𝒐𝒏𝒔 𝟒 𝒈𝒂𝒍𝒍𝒐𝒏𝒔 o Now cross multiply and solve! 12•N = 30•4 12•N = 120 12 12 N = $10 Independent Practice 3. It takes you 25 minutes to drive the 35 miles from school to your house. How long will it take you to drive the 70 miles from your house to the beach – if you travel at the same rate of speed? SHOW YOUR WORK! 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 𝒎𝒊𝒍𝒆𝒔 = 𝟐𝟓 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 𝟑𝟓 𝒎𝒊𝒍𝒆𝒔 = 𝑵 𝒎𝒊𝒏𝒖𝒕𝒆𝒔 𝟕𝟎 𝒎𝒊𝒍𝒆𝒔 35•N = 25•70 35•N = 1,750 35 35 N = 50 minutes 4. You used 4 cups of chocolate chips to bake 90 batches of cookies. How many cups do you need if you are planning to only bake 112.5 batches of cookies? SHOW YOUR WORK! 𝒄𝒖𝒑𝒔 𝒃𝒂𝒕𝒄𝒉𝒆𝒔 = 𝟒 𝒄𝒖𝒑𝒔 𝟗𝟎 𝒃𝒂𝒕𝒄𝒉𝒆𝒔 = 𝑵 𝒄𝒖𝒑𝒔 𝟏𝟏𝟐.𝟓 𝒃𝒂𝒕𝒄𝒉𝒆𝒔 90•N = 112.5•4 90•N = 450 90 90 N = 5 cups 72 UNIT RATE NOTES: Determining Unit Rate is nothing more than finding the cost/mileage/etc. for ONE unit. o Most unit rate questions will be given you information for more than one thing. Example: You can purchase 6 boxes of tissues for $15. How much does each box cost? o Write the information you have been given as a ratio. 𝟔 𝒃𝒐𝒙𝒆𝒔 $𝟏𝟓 o Next, set up a proportion to determine the cost of just one box of tissues. Don’t forget to write a ratio using words first. We are comparing boxes to cost. 𝒃𝒐𝒙𝒆𝒔 𝒄𝒐𝒔𝒕 = 𝟔 𝒃𝒐𝒙𝒆𝒔 $𝟏𝟓 = 𝟏 𝒃𝒐𝒙 $𝑵 o To solve the proportion you cross multiply, and divide. 𝟔 𝒃𝒐𝒙𝒆𝒔 $𝟏𝟓 = 𝟏 𝒃𝒐𝒙 $𝑵 o Multiply the 6 and N to get 6•N, and multiply the 15 and 1 to get 15•1. Set this up as an equation. o 6•N = 15•1 Solve as you would a regular equation o 6•N = 15 6 6 o N = $2.50 o You will see that you end up dividing the cost by the number of units. When you get better at finding unit rate, you can solve that way. Guided Practice You just paid $45 for 12 gallons of gas. How much did each gallon of gas cost you? o You paid $45 for 12 gallons of gas. Write this as a ratio. $𝟒𝟓 𝟏𝟐 𝒈𝒂𝒍𝒍𝒐𝒏𝒔 o We want to find the cost of ONE gallon. We write this as another ratio. 𝒄𝒐𝒔𝒕 $𝟒𝟓 $𝑵 = = 𝒈𝒂𝒍𝒍𝒐𝒏𝒔 𝟏𝟐 𝒈𝒂𝒍𝒍𝒐𝒏𝒔 𝟏 𝒈𝒂𝒍𝒍𝒐𝒏𝒔 o Now cross multiply and solve! 12•N = 45•1 12•N = 45 12 12 N = $3.75 73 INDEPENDENT PRACTICE 1. A pack of 5 books costs $18.75. A pack of 3 books $12.75. Which pack has the lowest cost per book? (hint – find the unit rate for each pack, then compare) SHOW YOUR WORK! 𝒃𝒐𝒐𝒌𝒔 𝒄𝒐𝒔𝒕 = 𝟓 𝒃𝒐𝒐𝒌𝒔 $𝟏𝟖.𝟕𝟓 = 𝟏 𝒃𝒐𝒐𝒌 𝒃𝒐𝒐𝒌𝒔 $𝑵 𝒄𝒐𝒔𝒕 5•N = 18.75•1 5•N = 18.75 5 5 N = $3.75 per book = 𝟑 𝒃𝒐𝒐𝒌𝒔 $𝟏𝟐.𝟕𝟓 = 𝟏 𝒃𝒐𝒐𝒌 $𝑵 3•N = 12.75•1 3•N = 12.75 3 N = $4.25 per book 3 Lowest cost per book 2. You found CDs on sale! Eight CDs would cost you $79.92. What is the cost per CD? 𝑪𝑫𝒔 SHOW YOUR WORK! 𝒄𝒐𝒔𝒕 = 𝟖 𝑪𝑫𝒔 $𝟕𝟗.𝟗𝟐 = 𝟏 𝑪𝑫 $𝑵 8•N = 79.92•1 8•N = 79.92 8 8 N = $9.99 per CD 3. You have the option of buying 20 tickets at the fair for $15 or 45 tickets for $27. Which is the best deal? SHOW YOUR WORK! 𝒕𝒊𝒄𝒌𝒆𝒕𝒔 𝟐𝟎 𝒕𝒊𝒄𝒌𝒆𝒕𝒔 𝟏 𝒕𝒊𝒄𝒌𝒆𝒕 = = 𝒄𝒐𝒔𝒕 $𝟏𝟓 $𝑵 20•N = 15•1 20•N = 15 20 20 N = $0.75 per ticket 𝒕𝒊𝒄𝒌𝒆𝒕𝒔 𝒄𝒐𝒔𝒕 = 𝟒𝟓 𝒕𝒊𝒄𝒌𝒆𝒕𝒔 $𝟐𝟕 = 𝟏 𝒕𝒊𝒄𝒌𝒆𝒕 $𝑵 45•N = 27•1 45•N = 27 45 45 N = $0.60 per ticket Best Deal 4. You can buy 30 cans of soda for $6. What is the cost per can? SHOW YOUR WORK! 𝒄𝒂𝒏𝒔 𝒄𝒐𝒔𝒕 = 𝟑𝟎 𝒄𝒂𝒏𝒔 $𝟔 = 𝟏 𝒄𝒂𝒏 $𝑵 30•N = 6•1 30•N = 6 30 30 N = $0.20 per can 74 Lesson H Independent Practice Name _______________________________ Date______________ Proportions & Unit Rates Solve each problem. Find your answer in one of the two answer boxes. Find the problem number on the coloring page and color each section with the number the color that corresponds to your answer. # 1 2 3 4 5 6 7 8 9 10 Problem Answer 1 Answer 2 It takes you 45 minutes to drive the 30 miles from your house to the mall. How long will it take you to drive the 75 miles to the beach? 50 minutes RED 112.5 minutes BLACK A box of 6 matchbox cars costs $11.94. A box of 4 matchbox cars costs $8.12. Which box has the lowest cost per car? Box of 6 DARK GREEN Box of 4 LIGHT GREEN You were able to purchase 5 gallons of gas for $19.85. How many gallons did you buy if you spent $47.64 189 gallons GRAY 12 gallons BLUE You used 5 cups of flour to bake 80 cookies. How many cups do you need if you are planning to bake 144 cookies? 16 cups BLACK 9 cups BROWN $287.64 PINK $7.99 RED 9 songs YELLOW 12 songs ORANGE Your family GRAY Their family BROWN $3.60 BLUE $22.50 PURPLE $15 RED $1.75 PINK 4,900 ft² ORANGE 100 ft² YELLOW You found DVDs on sale! Six DVDs would cost you $47.94. What is the cost per DVD? You have the option of downloading 12 songs online for $10.68 or 9 songs for $7.38. Which is the best deal? You are taking a trip at the same time as another family. Your family traveled 1,900 miles in 2 days, their family traveled 2,700 miles in 3 days. Who is traveling faster? Carla purchases 4 books for $10. Amy purchases 9 books. How much did Amy spend if her books cost the same as Carla’s? You can buy a 20 pound bag of dog food for $35. What is the cost per pound? Amy used 3 gallons of paint to cover 2,100 ft² of wall space inside her house. How much wall space can she paint with 7 gallons? 75 76 Name ________KEY________________ Date______________ Proportions & Unit Rates Solve each problem. Find your answer in one of the two answer boxes. Find the problem number on the coloring page and color each section with the number the color that corresponds to your answer. # 1 2 3 4 5 6 7 8 9 10 Problem Answer 1 Answer 2 It takes you 45 minutes to drive the 30 miles from your house to the mall. How long will it take you to drive the 75 miles to the beach? 50 minutes RED 112.5 minutes BLACK A box of 6 matchbox cars costs $11.94. A box of 4 matchbox cars costs $8.12. Which box has the lowest cost per car? Box of 6 Box of 4 DARK GREEN LIGHT GREEN You were able to purchase 5 gallons of gas for $19.85. How many gallons did you buy if you spent $47.64 189 gallons GRAY 12 gallons BLUE You used 5 cups of flour to bake 80 cookies. How many cups do you need if you are planning to bake 144 cookies? 16 cups BLACK 9 cups BROWN $287.64 PINK $7.99 RED You have the option of downloading 12 songs online for $10.68 or 9 songs for $7.38. Which is the best deal? 9 songs YELLOW 12 songs ORANGE You are taking a trip at the same time as another family. Your family traveled 1,900 miles in 2 days, their family traveled 2,700 miles in 3 days. Who is traveling faster? Your family GRAY Their family BROWN $3.60 BLUE $22.50 PURPLE $15 RED $1.75 PINK 4,900 ft² ORANGE 100 ft² YELLOW You found DVDs on sale! Six DVDs would cost you $47.94. What is the cost per DVD? Carla purchases 4 books for $10. Amy purchases 9 books. How much did Amy spend if her books cost the same as Carla’s? You can buy a 20 pound bag of dog food for $35. What is the cost per pound? Amy used 3 gallons of paint to cover 2,100 ft² of wall space inside her house. How much wall space can she paint with 7 gallons? 77 Name ______________ Exit Ticket H 1) After buying 8 movie tickets for $36, you realize you need to buy one more ticket. How much will one ticket cost you? 3) You paid $8.40 for 7 sodas at the movie theater. How much did each soda cost? 2) It takes you 60 minutes to drive 45 miles. If you drive at the same pace, how long should it take you to drive an additional 15 miles? 4) You bought 10 pounds of chicken for $13.00. How much did you pay per pound? Name ____KEY______ Exit Ticket H 1) After buying 8 movie tickets for $36, you realize you need to buy one more ticket. How much will one ticket cost you? $4.50 3) You paid $8.40 for 7 sodas at the movie theater. How much did each soda cost? $1.20 2) It takes you 60 minutes to drive 45 miles. If you drive at the same pace, how long should it take you to drive an additional 15 miles? 20 minutes 4) You bought 10 pounds of chicken for $13.00. How much did you pay per pound? $1.30 78 Name _____________ Warm Up I 1) 5 CDs cost $18.75. Find the cost of one CD. 2) 3 gallons of gas costs $8.85. How much would 12 gallons cost? 3) You can either buy 6 pairs of jeans for $75 or 4 pairs of jeans for $52. Which is the better buy? 4) You can download 12 songs for $9. How many songs can you download for $19.50? Name ____ KEY ____ Warm Up I 1) 5 CDs cost $18.75. Find the cost of one CD. 2) 3 gallons of gas costs $8.85. How much would 12 gallons cost? $3.75 $35.40 3) You can either buy 6 pairs of jeans for $75 or 4 pairs of jeans for $52. Which is the better buy? 6 pairs for $75 4) You can download 12 songs for $9. How many songs can you download for $19.50? 26 songs 79 Lesson I Activity Candy Bar Scale and Proportions Adapted from “Honey I Blew Up The Candy Bar” found at www.okea.org Materials: 1 packet per student 1 candy bar per student (fun size will work the best, and cost the least!) o It will be better if various sized candy bars are available to the students. Rulers Crayons, Markers or Colored Pencils 80 Name ___________________________________ Date____________________ Candy Bar Scale and Proportions You are going to find the scale factor between a miniature candy bar and an enlarged one. 1. Record the name of the candy bar you’ve been given. ______________________ 2. Find the dimensions of the candy bar in millimeters. Length _______________ Width _______________ Height_______________ 3. Record your results in the table below under the column for “Original Size.” 4. Using a scale of 10mm : 3.5cm, determine the dimensions for a new candy bar. Record these dimensions in the “New Size” column. ORIGINAL SIZE (mm) Show Your Work Here 10𝑚𝑚 Example 45 mm 3.5𝑐𝑚 = NEW SIZE (cm) 45𝑚𝑚 𝑥 10x = 45 • 3.5 10x = 157.5 x = 15.75 15.75 cm LENGTH WIDTH HEIGHT 81 The scale factor is 1 : 3.5 Your new candy bar should be 3.5 times bigger than the original. When you enlarge a candy bar, you also increase the amount of calories, fat, etc. Follow the directions below to determine the nutritional content of your new candy bar. 1. Copy the nutritional information from your candy bar into the table below under the “Original Size” column. 2. Set up and solve a proportion to determine the nutritional information in the new candy bar. Use the scale factor (1 : 3.5) from above. An example has been done for you. ORIGINAL SIZE Show Your Work Here 1 EXAMPLE: 240 grams 3.5 = NEW SIZE 240 𝑥 1x = 240 • 3.5 X = 840 840 grams Calories Total Fat Cholesterol Sodium Total Carbohydrates Protein 82 In the space below, create a drawing of the front your new candy bar. Be sure to use the measurements you found on the first page of this activity. Design it however you’d like – be sure to give it a name! Be neat, colorful and creative! 83 Name _____________ Exit Ticket I 1) James bought a model car. The scale is 1cm : 20in. The length of the model car is 12.5cm. What is the actual length, in inches, of the car? 2) A miniature house measures 4 inches tall. Using a scale of 1.5 in : 5 feet, find the height of the actual house. 3) The distance from your house to school on a map is 0.25 inches. Using a scale of 0.5 inches : 1 mile, how far is your home from school, in miles? 4) A football field measures 120 yards from end zone to end zone. Using a scale factor of 5 yards : 3 inches, how many inches long would a model football field have to be? Name ____ KEY _____ Exit Ticket I 1) James bought a model car. The scale is 1cm : 20in. The length of the model car is 12.5cm. What is the actual length, in inches, of the car? 2) A miniature house measures 4 inches tall. Using a scale of 0.75 in : 6 feet, find the height of the actual house. 250 inches 32 feet 3) The distance from your house to school on a map is 0.25 inches. Using a scale of 0.5 inches : 1 mile, how far is your home from school, in miles? 4) A football field measures 120 yards from end zone to end zone. Using a scale factor of 5 yards : 3 inches, how many inches long would a model football field have to be? 0.5 mile 72 inches 84
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