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Unit 2 - Lesson 5 - Grade 3: Illustrative Mathematics

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Last updated 2 months ago
17 Questions
Note from the author:
Grade 3 Unit 2
Lesson 5: Represent Products as Areas
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 2
Lesson 5: Represent Products as Areas
CC BY 2021 Illustrative Mathematics®
Lesson: Represent Products as Areas

How Many Do You See: One More (Warm Up)

1.

How many do you see?

2.

How do you see them?

Match Expressions and Areas

Your teacher has posted images of rectangles around the room. Match each expression with a rectangle that can represent it. Be prepared to explain your reasoning.
3.

9 x 5

4.

8 x 2

5.

7 x 10

6.

3 x 3

7.

2 x 6

8.

8 x 4

9.

5 x 7

Create from Expressions

The numbers in each expression represent the number of rows (or columns) in a rectangle and how many squares are in each row (or column).
10.

On the grid, draw each rectangle, label it with the numbers, and find its area.

3 x 4

11.

On the grid, draw each rectangle, label it with the numbers, and find its area.

4 x 6

12.

On the grid, draw each rectangle, label it with the numbers, and find its area.

6 x 3

13.

On the grid, draw each rectangle, label it with the numbers, and find its area.

7 x 4

14.

On the grid, draw each rectangle, label it with the numbers, and find its area.

3 x 2

15.

Explain why multiplying the numbers in each expression gives us the area of the rectangle.

Cool Down: Create a Rectangular Area
16.

Use the grid to create a rectangular area that represents the expression 7 x 4.

17.

Explain your reasoning.