Lesson 6 Different Square Units (Part 1)

    • Let’s learn about different units we can use to measure area.

Warm-up Notice and Wonder: Squares, Squares

What do you notice? What do you wonder?

A
A shaded rectangle partitioned into 5 rows of 10.
B
Diagram. Shaded rectangle partitioned into 3 rows of 6 of the same size squares.
C
Diagram. Shaded rectangle partitioned into 2 rows of 4 of the same size squares.
D
A shaded rectangle divided into 2 equal parts.

Activity 1 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.

Activity 2 What’s the Area?

an empty square.

Problem 1

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

  1. square inches (estimate)

  2. square centimeters (estimate)

Problem 2

Use the inch grid and centimeter grid to find the area of the square

  1. square inches

  2. square centimeters

Problem 3

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

  1. square inches

  2. square centimeters

Practice Problem

Problem 1

Here are two squares. One of the squares is a square centimeter and one of them is a square inch.

Which square is a square centimeter? Which square is a square inch? Explain how you know.

2 squares labeled A and B.