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Unit 2 - Lesson 12 - Grade 3: Illustrative Mathematics

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10 Questions
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Grade 3 Unit 2
Lesson 12: Area and Addition
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 2
Lesson 12: Area and Addition
CC BY 2021 Illustrative Mathematics®
Lesson: Area and Addition

Number Talk: So Close (Warm Up)

Find the value of each expression mentally.
1.

9 + 6

2.

29 + 6

3.

59 + 6

4.

49 + 8

Rectangles in Rectangles

5.

This rectangle represents space in a community garden. The shaded part is covered with vegetables and the unshaded part is covered with flowers. Each square represents 1 square foot.


What is the area of the whole space?

6.

Design your own garden. Find the area of each part of the garden and the area of the whole garden.

Find the Rectangles

7.

What do you notice?

8.

What do you wonder?

9.

Find the area of this figure. Explain or show your reasoning. Organize it so it can be followed by others.

Cool Down: Where are the Rectangles?
10.

Find the area of this figure. Explain or show your reasoning.