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Unit 3 - Lesson 17 - Grade 5: Illustrative Mathematics

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Grade 5 Unit 3
Lesson 17: Fraction Multiplication and Division Situations
CC BY 2021 Illustrative Mathematics
Grade 5 Unit 3
Lesson 17: Fraction Multiplication and Division Situations
CC BY 2021 Illustrative Mathematics
Lesson: Fraction Multiplication and Division Situations

Number Talk: Multiply and Divide (Warm Up)

Find the value of each expression mentally.
1.

2.

3.

4.

Info Gap: Tiles

Round 1


Your teacher will give you either a problem card or a data card. Do not show or read your card to your partner.

Problem Card Student: Silently read the problem card.

Data Card Student: Silently read the data card.
Problem Card Student:
"Can you tell me______?" (Ask for a specific piece of information)
Data Card Student:
"Why do you need to know _____?" (Repeat the information requested)
Problem Card Student:
"I need to know _______ because _______."
Data Card Student:
Listen to your partner's reason. Answer with information from the data card.
Problem Card Student:
Continue asking questions until you can say, "I have enough information to solve this problem."

Display the problem card.
5.

Solve the problem independently.

Data Card Student:
Share Data Card, then compare strategies and solutions.
Pause here so your teacher can review your work.

Ask your teacher for a new set of cards and repeat the activity, trading roles with your partner.

Round 2


Your teacher will give you either a problem card or a data card. Do not show or read your card to your partner.

Problem Card Student: Silently read the problem card.

Data Card Student: Silently read the data card.
Problem Card Student:
"Can you tell me______?" (Ask for a specific piece of information)
Data Card Student:
"Why do you need to know _____?" (Repeat the information requested)
Problem Card Student:
"I need to know _______ because _______."
Data Card Student:
Listen to your partner's reason. Answer with information from the data card.
Problem Card Student:
Continue asking questions until you can say, "I have enough information to solve this problem."

Display the problem card.
6.

Solve the problem independently.

Data Card Student:
Share Data Card, then compare strategies and solutions.
Pause here so your teacher can review your work.

Ask your teacher for a new set of cards and repeat the activity, trading roles with your partner.

Multiplication or Division

Solve each problem. Explain or show your reasoning.
7.

If 11 grains of rice weigh 1/3 gram, how much does each grain of rice weigh?

8.

Explain your reasoning.

9.

Mai’s road is 9/10 mile long. She ran 3/4 of the length of her road. How far did she run?

10.

Explain your reasoning.

11.

If each tennis ball weighs 21/16 ounces, how much do 9 tennis balls weigh?

12.

Explain your reasoning.

Cool Down: How Much Milk?
13.

A container has 2 cups of milk in it. How many 1/4 cups of milk are in the container? Explain or show your reasoning.


14.

A container has 2 cups of milk in it. The container is 1/3 full. How many cups does the
container hold? Explain or show your reasoning.