To make yummy fruit punch, use 2 cups of grape juice for every 3 cups of

apple juice.

If you already have 12 cups of apple juice, how many cups of grape juice will you need to make fruit punch?

In this lesson you will learn to solve ratio problems by using a

tape diagram.

3 ways to solve ratio problems

Let’s Review

1) Table with addition

Cups of grape juice 2 4 6 8

Cups of apple juice 3 6 9 12

+3

+3

+2 +2+2

+3

Let’s Review

Let’s Review

x4

x4

Cups of grape juice 2 8

Cups of apple juice 3 12

2) Table with multiplication

Let’s Review

Let’s Review

3) Double number lines

cups of grape juice

cups of apple juice

0

0

2

3

4

6

6

9

8

12

x4

x4

Let’s ReviewA Common Mistake

Thinking that a ratio describes just one situation

Example: 2 eggs for every 3 cups of flour

Let’s ReviewCore Lesson

To make yummy fruit punch, use 2 cups of grape juice for every 3 cups of apple juice. If you already have 12 cups of apple juice, how many cups of grape juice will you need to make fruit punch?

cups of apple juice

cups of grape juice 2

3

12

3 3 3

3 x 4 = 12

2 2 2

2 x 4 = 8

In this lesson you have learned to solve ratio problems by

using a tape diagram.

Let’s ReviewGuided Practice

Soda is on sale: 3 bottles for $4. How much would it cost to buy 15 bottles of soda? Use a tape diagram to solve.

Let’s ReviewExtension Activities

Soda is on sale: 2 bottles for $4. How much would it cost to buy 5 bottles of soda?

Let’s ReviewExtension Activities

In lemonade, the ratio of lemon juice to water is 1 to 3. How many cups of lemon juice will you need if you want to make 10 total cups of lemonade?

Let’s ReviewExtension Activities

In Adam’s class, 2 out of every 5 students play a sport. If there are 20 students in the class, how many students play a sport? Use a tape diagram to solve.

Let’s ReviewQuick Quiz

To make pink paint, you mix 3 gallons of white paint for every 4 gallons of red paint. How many gallons of red paint will you need to mix with 12 gallons of white paint? Use a tape diagram to solve.

In Ms. Henry’s class, there are 3 girls for every 2 boys. If there are 12 boys in the class, how many girls are in the class? Use a tape diagram to solve.