We are going to practise adding and subtracting positive and negative numbers in this activity.

Let's start with simple additions.

We can use a number line to help us.

When we **add **a number on a number line, we move to the **right** and when we **subtract,** we go to the** left.**

To work out **-3 + 5**** **we start at -3 on a number line and count forward 5 to get to 2.

So -3 + 5 = 2

To work out -**4 - 5**, we start at -4 on a number line and count back 5 to get to -9.

So -4 - 5 = -9

However, subtracting a **negative** number is the same as adding a **positive. **The answer may be positive or negative depending on the size of the number.

This means that if we have the question **5** - **- 3** this is the same as, 5 **+ 3,** since subtracting a negative number is the same as adding.

Below is a table to help you remember this rule.

**Example 1**

4 - 5 = - 1 This can easily be done using a number line.

**Example 2**

10 - - 4 = 14. Since we have a subtraction next to a negative number, we need to add 10 to 4, giving us 14.

**Example 3**

12 + -2 = 10. Since we have an addition next to a negative number, we need to subtract 2 from 10.

Would you like to start answering some questions now? Best of luck!