LESSON Name 96 Teacher Notes: page 627 • Introduce Hint #57 “Canceling Fractions.” • Using Reciprocals to Divide Fractions • Review Hint #56 “Reciprocal.” • Review “Fraction Terms” on page 19 in the Student Reference Guide. • For additional practice, students may complete Targeted Practice 96. New Concept • To use reciprocals to divide fractions: 1. 2. 3. 4. 5. Copy the first fraction. Change the ÷ to a ×. Flip the second fraction. Cross cancel (if possible). Multiply across. Example 2 ÷ __ 2= __ 1 3 1 3 __ 2 × __ __ =3=3 2 1 1 1 • Cross cancel fractions to make multiplying and dividing fractions easier. Canceling fractions is another way to reduce. Example 3 ÷ __ 4 8 © 2008 Saxon 1 __ 2 1 __ 4 × 8 __ 3 2 (Cancel the 8 and the 4.) = __ 3 1 Saxon Math Intermediate 5 SM_H5_AD_L096_FF.indd 625 625 Adaptations Lesson 96 11/3/07 11:53:25 AM Lesson Practice Copy, change, and flip. If necessary, convert. 1 = 1 ÷ __ a. __ 3 2 2 ÷ __ 3 = b. __ 3 4 2 ÷ __ 1 = c. __ 3 4 1 × ___ = __ 3 2 × ___ = __ 3 2 × ___ = __ 3 1 1 ÷ __ d. __ 2 3 ___ 3 ÷ __ 2 e. __ 4 3 = × ___ = ___ = f. Cross cancel. 3 3 ÷ __ 4 × ___ = ___ 1 g. 2 ÷ __ 3 ___ 2 h. 3 ÷ __ 3 = × ___ = ___ i. Cross cancel. × ___ = 5 10 ÷ __ = 6 j. How many 3_1 s are in 4_3 ? 3 ___ __ ÷ = 4 k. How much of 4_3 is in 1_3 ? 1 ÷ ___ = __ 3 × ___ = page 629 Written Practice 1. Shade __ 2 × ___ = = ___ 1. = 1 of __ 1= 2. __ 2 2 2. Shade __ 3 © 2008 Saxon What percent is that? Use work area. Saxon Math Intermediate 5 SM_H5_AD_L096_FF.indd 626 626 Use work area. Adaptations Lesson 96 11/3/07 11:53:27 AM Written Practice, continued page 629 3. Cross cancel. 4. Estimate the product. 2 of ___ = __ 3 712 490 5. digits ninety-three million, eight hundred fourteen thousand, two hundred , , 1= 7. __ 4 6. How many one tenths are there in three? 1 ÷3 A ___ 10 1 B 3 ÷ ___ 10 1 ÷ ___ 3 C ___ 10 10 D ___ 20 1 = + ___ __ 20 5 3 ÷ ___ 1 ___ 10 10 Use work area. 9. Multiples: Think multiplication table. 8. Copy, change, and flip. 1 × ___ = a. __ 3 × ___ = b. __ © 2008 Saxon a. b. , , , 10. Cross cancel. _3 4 of 10 tons Saxon Math Intermediate 5 SM_H5_AD_L096_FF.indd 627 627 Adaptations Lesson 96 11/3/07 11:53:28 AM page 630 Written Practice, continued 11. Label the figure. A B ? C 12. decimal, reduced fraction, and percent D 13. Copy, change, and flip. 1 = ÷ __ 4 3 1 __ ___ × ___ = . 14. Copy, change, and flip. 1 = 1 ÷ __ __ 3 4 ___ × ___ = 15. Copy, change, and flip. 16. m + 1.4 = 3.75 1 = 3 ÷ __ 2 ___ × ___ = 17. m − 1.4 = 3.75 10 1 × ___ = ____ 18. ___ 100 10 19. Write your answer with a dollar sign. 20 × 47¢ = © 2008 Saxon m= m= Saxon Math Intermediate 5 SM_H5_AD_L096_FF.indd 628 628 Adaptations Lesson 96 11/3/07 11:53:30 AM page 630 Written Practice, continued 0 R _________ 21. 30 ) 4 2 7 20. 568 ÷ 15 = ________ 22. 6m = $30.24 Think 20 ) 6 0 0 Use work area. 2 × __ 1 = 23. 5 × __ 3 2 m= Use work area. ____ 25. √ 100 1+2 = 24. 5 − 1 __ 4 52 Cross cancel. 1 = 2 × __ __ 2 3 5 __ × ___ = Use work area. 26. 20, 18, 30, 20, 22, 28, 31, 20, 27, 30, 26, 31, 20, 24, 28 In order: 18, , , , , a. mode Mode , , , , most Range , , , , 31 b. range a. © 2008 Saxon , c. median span Median b. 27. a. Classify triangle ABD by sides. middle c. A b. What single transformation would move triangle ABC to triangle ADC? D C B a. b. Saxon Math Intermediate 5 SM_H5_AD_L096_FF.indd 629 629 Adaptations Lesson 96 11/3/07 11:53:31 AM page 631 Written Practice, continued 28. Michelle’s birthday July 4 July 4 + 14 days = July Mio’s birthday Mio’s birthday + 6 days = Rusita’s birthday Use work area. 29. Tyrone 21 miles per gallon Trina 500 ÷ 21 = 500 ÷ 26 miles per gallon 500 ÷ 26 = = 500 ÷ gallons = gallons gallons Tyrone purchased gallons Trina purchased fewer gallons I used numbers. Tyrone purchased about gallons. Trina purchased about − gallons. = Use work area. 30. a. Range span b. metal that melts at coldest temperature melting temperature of gold: 1064.43°C © 2008 Saxon c. melting temperature of ruthenium: − I rounded the numbers. – = Use work area. Saxon Math Intermediate 5 SM_H5_AD_L096_FF.indd 630 630 Adaptations Lesson 96 11/3/07 11:53:33 AM LESSON Name 97 Teacher Note: page 633 • Refer students to “Ratio” on page 21 in the Student Reference Guide. • Ratios New Concept • Ratios can be written as fractions. Math Language Ratio – a way of comparing numbers by division 12 __ “12 to 18” is written 18 . 12 ÷ 6 = _2_ • Reduce ratios like fractions: _______ 18 ÷ 6 3 • Do not convert ratios. Leave them as improper fractions. Example There were 12 girls and 16 boys in the class. What was the ratio of boys to girls? boys ___ 16 _____ 1. Write the ratio: girls 12 2. Reduce but don’t convert: 4 16 ÷ 4 = __ _______ 12 ÷ 4 3 The ratio of boys to girls is 3_4. Lesson Practice There were 20 prairie dogs and 30 jackrabbits in a section of the Texas high plains. a. What was the ratio of jackrabbits to prairie dogs? jackrabbits ___________ © 2008 Saxon 114 = ____ 114 Reduce but don’t convert. ____ prairie dogs 114 114 b. What was the ratio of prairie dogs to jackrabbits? prairie dogs ___________ jackrabbits 114 = ____ 114 Reduce. ____ 114 114 Saxon Math Intermediate 5 SM_H5_AD_L097_FF.indd 631 631 Adaptations Lesson 97 11/3/07 11:55:46 AM Lesson Practice, continued There were 8 red socks and 10 blue socks in George’s drawer. c. What was the ratio of red socks to blue socks? red socks ____ 114 __________ 114 Reduce. = ____ blue socks 114 114 d. What was the ratio of blue socks to red socks? blue socks ____ 114 __________ red socks 114 114 Reduce but don’t convert. = ____ 114 page 635 Written Practice 1. pennies ____ 114 _______ nickels 114 114 = ____ 114 2. The sum of one fourth and one fourth is one half. Reduce but don’t convert. $4.00 3. $0.00 ____ ) $0.00 00 $0.00 $ left. I divided by Saxon Math Intermediate 5 SM_H5_AD_L097_FF.indd 632 to find the total amount of and . 632 © 2008 Saxon She has Adaptations Lesson 97 11/3/07 11:55:47 AM page 635 Written Practice, continued 4. How many 8_1 s are in 2_1 ? 5. decimal and reduced mixed number shaded 1 1 ÷ __ __ 2 8 Copy, change, and flip. Cross cancel. . . 6. − . 7. a. A quart is what fraction of a gallon? b. one gallon = 0 gallons _______ c. quarts quarts 4 1 = __ __ ? 1 a. b. c. 2= 8. __ 3 15 ___ 15 9. decimal number and fraction 15 2 = − ___ __ 5 15 © 2008 Saxon 0 10 10 . Use work area. Saxon Math Intermediate 5 SM_H5_AD_L097_FF.indd 633 633 Adaptations Lesson 97 11/3/07 11:55:48 AM page 636 Written Practice, continued 10. Copy, change, and flip. 1÷2 __ 2 1 2 ÷ __ 2 00 1 × ___ __ 2 00 00 × ___ 00 ___ 00 00 Use work area. 11. Label the figure. A 12. Copy, change, and flip. 2 = 3 ÷ __ 3 __ B ? D C 2 ÷ 3 = 13. __ 3 __ 7 = 7 + ___ 14. ___ 10 10 × __ = × __ = Convert and simplify. 15. 43.15 16. ($10 − 19¢) ÷ 9 = 17. 6 × 72¢ = 00.00 © 2008 Saxon 00.00 0000.00 Saxon Math Intermediate 5 SM_H5_AD_L097_FF.indd 634 634 Adaptations Lesson 97 11/3/07 11:55:50 AM page 636 Written Practice, continued 0 _________ 19. 24 ) 5 18. 35 = 2 0 R 0 20. Reduce: 50 ____ 100 = 3 = 3 − 3 − 1__ 22. 5 __ 4 4 21. 12y = 1224 Simplify. y= 1 + 1__ 1 + 1__ 1 + 1__ 1= 23. 1__ 4 4 4 4 24. Write the missing number as your answer. 3 = ____ ___ 10 100 25. 26. area = 64 sq. in. inch 1 each side = 2 in. The opposite of “squared” is “square root.” © 2008 Saxon a. length b. perimeter a. b. Saxon Math Intermediate 5 SM_H5_AD_L097_FF.indd 635 635 Adaptations Lesson 97 11/3/07 11:55:54 AM page 636 Written Practice, continued 1 of 640 27. ___ 64 28. What are the next three terms in this Fibonacci sequence? 1, 1, 2, 3, 5, 8, 13, 21, , , ,… 1+1= 1+2= 2+3= Use work area. 29. a. factors of 64: , , , , , , b. Is the number of factors an odd or even number? c. What is the median of the factors? ___ d. What is √ 64 ? Use work area. stripes _______ stars 123 ____ 123 Saxon Math Intermediate 5 SM_H5_AD_L097_FF.indd 636 © 2008 Saxon 30. 636 Adaptations Lesson 97 11/3/07 11:55:55 AM LESSON Name 98 Teacher Notes: page 638 • Introduce Hint #58 “Positive and Negative Numbers.” • Review “Number Line” on page 12 in the Student Reference Guide. • Temperature • Review Reference Chart “Number Line.” New Concept • On a number line there are both positive and negative numbers. Math Language Positive numbers are greater than zero. • Negative numbers are written with a minus sign in front. Negative numbers are less than zero. Ľ5 Zero is neither negative nor positive. Ľ4 Ľ3 Ľ2 Ľ1 negative 0 1 2 3 positive 4 5 • To calculate the difference between a positive temperature and a negative temperature: 1. Find the difference from the positive temperature to 0. 2. Find the difference from the negative temperature to 0. 3. Add the two differences together. Example How many degrees are there between 6°C and −2°C? 1. The difference from 6°C to 0°C is 6°. 6 2. The difference from −2°C to 0°C is 2°. 4 3. Add the differences. 6 2 © 2008 Saxon 6° + 2° = 8° There are 8° between 6°C and −2°C. 0 2 Ľ2 Ľ4 C Saxon Math Intermediate 5 SM_H5_AD_L098_FF.indd 637 637 Adaptations Lesson 98 11/3/07 12:00:52 PM Lesson Practice a. Write the temperature that is twelve degrees below zero on the Fahrenheit scale. b. What temperature is shown on this thermometer? 10 0 c. If the temperature shown is 14° lower than the high temperature for the day, then what was the high temperature? –10 C Count up 14°. d. If the temperature falls 3° from the temperature shown, what will the temperature be? Count down 3°. Use the table below to answer problems e and f. Daily Temperatures ( ˚C) Day Sun Mon Tues Wed Thurs Fri Sat High ( ˚C) 25 20 32 40 45 30 32 Low (˚C) 11 13 15 23 25 15 15 e. What is the median of the low temperatures for the week? List the temperatures from least to greatest. , , , , , , f. What is the mean (average) of the high temperatures for the week? mean: Saxon Math Intermediate 5 SM_H5_AD_L098_FF.indd 638 638 © 2008 Saxon median: Adaptations Lesson 98 11/8/07 1:09:03 PM page 641 Written Practice cats 1. _____ dogs ____ = ____ 2. a. name Reduce. a. b. How many faces? b. 3. 1.2 miles 4. 10˚ Start at 2ºF. Count down 5ºF. . 0 Ľ10˚ F 5. A Ľ5 Ľ4 Ľ3 B Ľ2 C D Ľ1 0 1 2 3 4 a. Which arrow could be pointing to 2 3_1? 5 a. b. Which arrow is pointing to negative three? b. © 2008 Saxon 6. person trout (person + 10) mph sailfish (trout + 45) mph Saxon Math Intermediate 5 SM_H5_AD_L098_FF.indd 639 mph 639 Adaptations Lesson 98 11/3/07 12:00:59 PM page 641 Written Practice, continued 7. K J 6.5 8. L M 9. 4.26 . . N A ∠JNK B ∠KNL C ∠KNM D ∠LNM 23.45 10. – . 14. 364 ÷ 16 = + 0.367 11. – + . 12. $1.25 × 7 = . 13. 608 × 750 17. 8 5 ___ 15 7 – 4 ___ 15 . 15. $7.20 ÷ 20 = 16. _____ Think 20 ) 4 0 0 . 1 3 __ 2 1 + 1 __ 2 = 6 1 – 1 __ 3 Saxon Math Intermediate 5 SM_H5_AD_L098_FF.indd 640 19. Identity Property of Multiplication 4 of 25 = 20. __ 5 Cross cancel. 5 1 × __ = 7 21. Copy, change, and flip. 3 ÷ __ 2 = __ 4 3 3 × ___ 00 = __ 00 4 640 © 2008 Saxon 18. Adaptations Lesson 98 11/3/07 12:01:01 PM Written Practice, continued page 642 30 = 22. Write the missing number as your answer. 23. Reduce: ____ 100 7 = ____ ___ 100 10 24. 10 a. highest temperature 90 b. lowest temperature 80 0 difference from highest temperature to 0 70 –10 F highest c. range of temperatures F lowest difference from lowest temperature to 0 + sum of the differences a. b. c. ___ 25. 92 +√81 26. a. List the factors of the smaller number (70). © 2008 Saxon Cross out those that are not factors of the larger number (100). , , , , , , 70 ÷ __ = b. ____ 100 , a. b. Saxon Math Intermediate 5 SM_H5_AD_L098_FF.indd 641 641 Adaptations Lesson 98 11/3/07 12:01:03 PM page 642 Written Practice, continued 1 1 × __ 27. a. __ 3 2 1 __ 2 1 1 × __ b. __ 3 2 28. Which transformation moves the first triangle to the position of the second triangle? 1 __ 3 A translation B rotation C reflection D slide Use work area. 29. Which of these numbers is a composite number? A 3 B 5 C 7 D 9 30. least to greatest 0.376 0.037 © 2008 Saxon 0.38 0.367 , Saxon Math Intermediate 5 SM_H5_AD_L098_FF.indd 642 642 , , Adaptations Lesson 98 11/3/07 12:01:05 PM LESSON Name 99 Teacher Notes: page 644 • Review “Decimal Arithmetic Reminders Chart” on page 9 in the Student Reference Guide. • Adding and Subtracting Whole Numbers and Decimal Numbers • For additional practice, students may complete Targeted Practice 99. New Concept • Line up the decimal points. • Fill empty spaces with zeros. • Put a decimal point on the back of any whole number. Example 6.2 + 4.25 + 3 6.20 4.25 + 3.00 13.45 Lesson Practice Find each sum or difference: 4.3 a. + 12.0 b. + . 6.4 c. + . 4.4 d. . . + 56.4 © 2008 Saxon f. + 8.2 g. . . + Saxon Math Intermediate 5 SM_H5_AD_L099_FF.indd 643 9.2 i. h. . . + 643 5.2 e. + . 4.75 – . . j. . 12.4 – . . Adaptations Lesson 99 11/3/07 12:04:00 PM Lesson Practice, continued k. Which digit in 24.7 is in the same place as the 6 in 16? l. Compare: 12 12.0 Written Practice 1. girls _____ boys __ = page 646 __ 2. Cancel the matching zeros. Don’t convert. ate 2 = __ ___________ total pieces 2 __ What percent is that? Simplify. 3. pens _____ $ 5 = ___ __ ? 1 4. “Slower” means more time. 13.8 0013.0 6. 10n = 100 5. decimal and reduced mixed number 3 4 © 2008 Saxon n= X n2 = . Saxon Math Intermediate 5 SM_H5_AD_L099_FF.indd 644 644 Adaptations Lesson 99 11/3/07 12:04:02 PM page 647 Written Practice, continued 7. one thousand, six hundred twenty and three tenths . 8. Estimate the area. 2 ft 11 in. Area = length × width 2 ft 11 in. 6 ft 10 in. 6 ft 10 in. 9. 10. $7.13 7 __ 8 3 = − __ __ 8 4 Use work area. 11. Label the figure. R S ? T © 2008 Saxon Q Saxon Math Intermediate 5 SM_H5_AD_L099_FF.indd 645 645 Adaptations Lesson 99 11/3/07 12:04:03 PM page 647 Written Practice, continued ___ 13.4 12. + . 15. 60 = 2 13. 7.25 – ___ 14. √ 25 – √ 16 . 0 _________ 16. 28 ) 9 5 2 17. $18.27 ÷ 9 = ______ Think 30 ) 1 0 0 0 . 5 + 1 __ 7= 18. 4 __ 8 8 3−1 = 19. 5 − 2 __ 5 1= 3 × __ 20. __ 4 3 Cross cancel. Convert and simplify. 3÷ 3 = __ 4 3 __ 4 × __ = 22. Write the missing number as your answer. 9 ___ 10 20 = 23. Reduce: ____ 100 © 2008 Saxon 21. Copy, change, and flip. = ____ 100 Cross cancel. Saxon Math Intermediate 5 SM_H5_AD_L099_FF.indd 646 646 Adaptations Lesson 99 11/3/07 12:04:05 PM page 648 Written Practice, continued 24. Gallons Fluid Ounces 1 2 3 4 5 128 256 384 512 640 the number of a. Rule: by . b. How many fluid ounces in 8 gallons? ounces in each gallon × number of gallons Use work area. 25. Use digits and symbols to write the temperature that is ten degrees below zero Fahrenheit. 26. à1 © 2008 Saxon 3, à3 4, à? 7, 3, 4, 7, 12, 19, Saxon Math Intermediate 5 SM_H5_AD_L099_FF.indd 647 à? 12, à? 19, , ____, , , ... 647 Adaptations Lesson 99 11/3/07 12:04:06 PM page 648 Written Practice, continued 27. A standard number cube is rolled once. a. What is the probability that the upturned face is 3 or less? b. Describe a different event that has the same probability. The upturned face is an number. Use work area. 28. two billion, six hundred million Expanded notation using powers of 10 See page 506. × ( )+( × ) Use work area. 29. Which transformation would position triangle A on triangle B? y 5 4 3 A translation B rotation C reflection D flip A 2 1 B x 1 2 3 4 5 © 2008 Saxon 0 3 = ___ 00 3 + __ 30. __ 8 8 00 Reduce. Saxon Math Intermediate 5 SM_H5_AD_L099_FF.indd 648 648 Adaptations Lesson 99 11/3/07 12:04:07 PM LESSON Name 100 page 649 • Simplifying Decimal Numbers New Concept • Get rid of the extra zeros in front and back. • Keep the zero in front of the decimal. • Don’t remove zeros in the “middle.” Example 0 2.0 1 0 0 = 2.0 1 0.4 2 0 0 = 0.4 2 Lesson Practice Simplify each decimal number: a. 0 3 . 2 0 = b. 0.320 = c. 32.00 = d. 3.020 = Simplify each answer. e. 3.65 + 6.35 f. = 23.16 – 19.46 g. 4.23 – 3.18 = = © 2008 Saxon h. Attach a zero to the end of 2.5 without changing its value. i. Attach a zero to the end of 6 without changing its value. Saxon Math Intermediate 5 SM_H5_AD_L100_FF.indd 649 649 . . Adaptations Lesson 100 1/3/08 10:17:26 PM page 651 Written Practice _______ 1. carrots peas ____ = ____ 10 = __ 2. rolls ____ 3.25 ? $ 3× 3. __ 4 ____ = Cross cancel. 3= __ 4 percent Reduce. 4. 5. Attach a zero to the end of 8 without changing the value of the number. Use a decimal. a. How many pins form the perimeter? b. How many small squares cover the rectangle? a. b. 3 6. a. 7 __ 4 . A B C D b. negative 2 0 a. 5= 7. __ 6 10 © 2008 Saxon –10 b. 1 __ m 5 __ 8. cm = ? ___ 12 3 __ = – ___ 4 12 Use work area. Saxon Math Intermediate 5 SM_H5_AD_L100_FF.indd 650 650 Adaptations Lesson 100 11/3/07 12:10:14 PM page 652 Written Practice, continued 1 __ 2 6.2 0 10. 9. Find AD. .0 0 of 40 mm is A mm. + B C .0 0 D ? 11. 103 − 102 = 6.37 12. − 14. 10 × $1.75 = 13. 234 × 506 . 15. $17.50 ÷ 10 = 16. Write the missing number as your answer. 1 = _____ ___ 50 100 ___ 18. √ 6 4 = 19. 16w = 832 © 2008 Saxon 40 = 17. Reduce: ____ 100 w= Saxon Math Intermediate 5 SM_H5_AD_L100_FF.indd 651 651 Adaptations Lesson 100 11/3/07 12:10:16 PM page 652 Written Practice, continued 5 + __ 5= 5 + __ 20. __ 9 9 9 9 = 9 × ___ 21. ___ 10 10 22. Copy, change, and flip. 2 ÷ __ 3= __ 3 4 Convert and reduce. 3 23. 3 ÷ __ = 4 24. yd ft 1 __ = 10 ___ ? Cross cancel. 25. See page 3 in the Student Reference Guide. June (start on Jun. 21) July August September © 2008 Saxon October November December (don’t count Dec. 21) Saxon Math Intermediate 5 SM_H5_AD_L100_FF.indd 652 + 652 Adaptations Lesson 100 11/3/07 12:10:17 PM Written Practice, continued page 653 26. a. How many faces? a. b. How many edges? b. 27. 10 0 Ľ10 C 5º colder than 0ºC 28. have a brother 7 6 have a sister 9 © 2008 Saxon a. How many children have a brother? b. How many have a sister but not a brother? c. The numbers in the circles do not add to 30. What does that mean? children have siblings. Use work area. Saxon Math Intermediate 5 SM_H5_AD_L100_FF.indd 653 653 Adaptations Lesson 100 11/3/07 12:10:20 PM page 653 Written Practice, continued 29. Elapsed Time (in minutes) 0 10 20 30 Distance Traveled (in miles) 0 6 14 22 a. line graph 2 = 44 22 × __ ___ b. miles ___ 2 min 30 2 = 88 miles 44 ___ ___ × __ 2 min A rate of 22 miles in 30 minutes is equal to a rate of 44 miles in minutes and 88 miles in minutes, which is about hours. Use work area. 30. North Canadian River of North Canadian River Wisconsin River Saxon Math Intermediate 5 SM_H5_AD_L100_FF.indd 654 _1 2 © 2008 Saxon _1 2 of North Canadian River + 30 654 Adaptations Lesson 100 11/3/07 12:10:21 PM
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