# Convert Square Units of Measurement

In this worksheet, students will convert between square mm, cm and m

Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Use Standard Units of Measure

Difficulty level:

#### Worksheet Overview

In this activity, we are  going to be finding the area of shapes, converting into different units where necessary.

To find the area of a square, we multiply the length x the width.

A 1 m by 1 m square has an area of 1 m2

If we divide the square into cm, there are 100 cm along each edge.

The area of this square is therefore 1 m x 1 m = 1 m2 or 100 cm x 100 cm = 10,000 cm2

A 1 cm by 1 cm square has an area of 1 cm

If we divide the square into mm, there are 10 mm along each edge.

The area of this square is therefore 1 cm x 1 cm = 1 cm2 or 10 mm  x 10 mm = 100 mm2

Have you got that?

Be very careful if you have to convert between measurements, when finding areas or volumes - make sure that you convert to the correct unit before you do the calculation. If you convert after you've done the calculation, you will probably get the wrong answer!

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