The Lesson

A number line can be used to subtract numbers.

Imagine we wanted to find 7 − 3.

How to Subtract on a Number Line

Subtracting on a number line is easy.

Question

Use a number line to find 7 − 3.

Step-by-Step:

1

Find 7 on the number line.
7 − 3

2

Move 3 to the left along the number line.
7 − 3

3

Read off the number you have reached.

Answer:

7 − 3 = 4

Lesson Slides

The slider below shows another real example of how to subtract on a number line. Open the slider in a new tab

Top Tip

To Subtract, Go Left

Subtracting means going left on a number line.