Unit 3 Chapter 4 Section 1 Ratios.notebook
Unit 3
Chapter 4
Ratios, Rates and Proportions
December 02, 2014
Unit 3 Chapter 4 Section 1 Ratios.notebook
December 02, 2014
Unit 3
Chapter 4 Section 1
Ratios
Objective: To write ratios and use them to compare quantities
Ratio: a comparison of two quantities by division
You can write a ratio in three ways: 5 to 7
Equivalent Ratio: two ratios that are equal
5:7
5
7
Unit 3 Chapter 4 Section 1 Ratios.notebook
December 02, 2014
Examples:
Writing Ratios:
Use the table to answer questions 1 ­ 3: Write each ratio as a fraction in simplest form.
Wins Losses
1) Tigers wins to Tigers losses
Panthers
12
6
Leopards
9
9
8
6
10
12
Lions
2) Leopards wins to Leopards losses
Tigers
3) Lions wins to Tigers wins
Unit 3 Chapter 4 Section 1 Ratios.notebook
December 02, 2014
Writing Equivalent Ratios
4) Find a ratio equivalent to 4
5
5) Find a ratio equivalent to 1
8
6) Write the ratio 2 yd to 20 ft as a fraction in simplest form.
7) Write the ratio 3 gal to 10 qt as a fraction in simplest form.
Unit 3 Chapter 4 Section 1 Ratios.notebook
December 02, 2014
Comparing Ratios
8) An official U.S. flag has a length­to­width ratio of 19 : 10. the largest U.S. flag measures 505 ft by 255 ft. Is this an official U.S. flag?
Hint: You can use decimals to express and compare ratios.
Tell whether the ratios are equivalent or not equivalent.
9) 7 : 3, 128 : 54
10) 6.1 to 7, 30.5 to 35
11) 180 , 25
240
34
Write in simplest form.
12) 2.4
16
13) 8.5
15
Unit 3 Chapter 4 Section 1 Ratios.notebook
Homework:
Practice 4.1
December 02, 2014