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Unit 1 - Lesson 20 - Grade 3: Illustrative Mathematics

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15 Questions
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Grade 3 Unit 1
Lesson 20: The Commutative Property
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 1
Lesson 20: The Commutative Property
CC BY 2021 Illustrative Mathematics®
Lesson: The Commutative Property

Number Talk: Subtraction (Warm Up)

Find the value of each expression mentally.
1.

70 - 10

2.

68 - 10

3.

70 - 12

4.

68 - 12

Learn More About Multiplication

5.

What do you notice?

6.

What do you wonder?

7.

How are the situations the same?

8.

How are the situations the different?

9.

Write an equation for Image A.

10.

Write an equation for Image B.

11.

How does your equation connect to the situation and array for Image A?

12.

How does your equation connect to the situation and array for Image B?

Revisit Arrays

13.

Write 2 multiplication equations that represent the array.

14.

Explain why both equations can represent the array.

Cool Down: Multiplication Reflection
15.

Summarize what you learned about multiplication today.