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Unit 7 - Lesson 10 - Grade 3: Illustrative Mathematics

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12 Questions
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Grade 3 Unit 7
Lesson 10: Problem Solving With Perimeter and Area
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 7
Lesson 10: Problem Solving With Perimeter and Area
CC BY 2021 Illustrative Mathematics®
Lesson: Problem Solving With Perimeter and Area

True or False: Divide in Parts (Warm Up)

1.

2.

Explain your reasoning.

3.

4.

Explain your reasoning.

5.

6.

Explain your reasoning.

7.

8.

Explain your reasoning.

Rope Off the Garden

9.

Andre wants to know how much rope is needed to enclose the new rectangular school garden. The length of the garden is 30 feet. The width of the garden is 8 feet.
  • Clare says she can use multiplication to find the length of rope Andre needs.
  • Diego says he can use addition to find the length of rope Andre needs.
Who do you agree with? Explain or show your reasoning.

Info Gap: A Garden and a Playground

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.
10.

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.
11.

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.
Cool Down: Lin’s Garden Fence
12.

Lin is building a fence around her rectangular garden. A diagram is shown. The area of the garden is 36 square feet. How many feet of fencing material will she need to enclose the whole garden?