# 3 Addition and subtraction on the number line

Watch the video below to see how you can use a number line to help you with addition and subtraction involving negative numbers.

#### Transcript

See how you get on in this next activity.

## Activity 3 Working with negative numbers

Try the following examples. Start by drawing your own number line from –10 to + 10.

- a.3 − 7

Well done for completing your first calculations using negative numbers. These examples all involved subtracting or adding positive numbers to a negative number. Things become slightly more challenging when looking at adding and subtracting negative numbers, but again you’re going to call in your trusty number line to help.