lesson 6-1 pages 264-268 ratios and rates. what you will learn! 1. how to write ratios as fractions...

Lesson 6-1 Pages 264-268

Ratios and Rates

What you will learn!1. How to write ratios as fractions in simplest form.

2. How to determine unit rates.

RatioRatioRateRateUnit rateUnit rate

What you really need to know!

A ratio is a comparison of two numbers by division. Ratios can be written in three ways and should be in simplest form.

Example 1:

Express the ratio 10 roses out of 12 flowers as a fraction in simplest form.

6

5

12

10

5 to 6

5 : 6

Example 2:

Express the ratio 21 inches to 2 yards as a fraction in simplest form.

2 yards must be converted into inches first!2 yd x 36 inches = 72 inches

Example 2:

Express the ratio 21 inches to 72 inches as a fraction in simplest form.

24

7

72

21

7 to 24

7 : 24

Example 3:

A 12-oz bottle of cleaner cost $4.50. A 16-oz bottle of cleaner cost $6.56. Which costs less per ounce?

Example 3:

38.01

375.0

1212

1250.4

12

50.4

41.01

41.0

1616

1656.6

16

56.6

The 12-oz bottle is less per ounce!

Example 4:

A snail moved 30 feet in 2 hours. How many inches per minute did the snail move?

30 feet must be changed to inches.

2 hours must be changed to minutes.

Example 4:

A snail moved 30 feet in 2 hours. How many inches per minute did the snail move?

30 ft x 12 in = 360 inches

2 hrs x 60 min = 120 minutes

Example 4:

A snail moved 360 inches in 120 minutes. How many inches per minute did the snail move?

3in/min1

3

120

360

Page 266

Guided Practice

#’s 4-15

Pages 264-266 with someone at home and study

examples!

Read:

Homework: Pages 266-268

#’s 16-46 even

51, 52, 54-70

Lesson Check 6-1

Page

736

Lesson 6-1

Lesson Check 6-1