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Unit 2 - Lesson 6 - Grade 3: Illustrative Mathematics

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Grade 3 Unit 2
Lesson 6: Different Square Units (Part 1)
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 2
Lesson 6: Different Square Units (Part 1)
CC BY 2021 Illustrative Mathematics®
Lesson: Different Square Units (Part 1)

Notice and Wonder: Squares, Squares (Warm Up)

What do you notice?

What do you wonder?

Same Rectangle, Different Units

Your teacher will give you two kinds of grid paper. Use them to create a rectangle for each expression.
  • Partner 1: Use grid 1.
  • Partner 2: Use grid 2.

Partner 1

Create a rectangle for the expression.

2 x 5

Create a rectangle for the expression.

7 x 3

Create a rectangle for the expression.

6 x 8

Partner 2

Create a rectangle for the expression.

2 x 5

Create a rectangle for the expression.

7 x 3

Create a rectangle for the expression.

6 x 8

What’s the Area?

Estimate how many square centimeters and inches it will take to tile this square.

_______ square inches (estimate)

_______ square centimeters (estimate)
Use the inch grid and centimeter grid to find the area of the square.

_______ square inches

_______ square centimeters
Write a multiplication expression that describes the rows and columns in the square and can tell us the area in each unit.

square inches _______

square centimeters _______
Cool Down: Which Square?
Here is a rectangle.


Here are 2 different squares you could use to tile.

Which square would allow you to tile the rectangle with the fewest number of squares? Explain your reasoning.