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Unit 7 - Lesson 10 - Grade 3: Illustrative Mathematics

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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)

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Rope Off the Garden

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Info Gap: A Garden and a Playground

Cool Down: Lin’s Garden Fence
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Pitanje 1
1.

Pitanje 2
2.

Explain your reasoning.

Pitanje 3
3.

Pitanje 4
4.

Explain your reasoning.

Pitanje 5
5.

Pitanje 6
6.

Explain your reasoning.

Pitanje 7
7.

Pitanje 8
8.

Explain your reasoning.

Pitanje 9
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.

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.

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Pitanje 10
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.

1
Pitanje 11
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.

Pitanje 12
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?