2. We can think of numbers being on a number line: These numbers are all positive numbers.

3. The number line can also continue on past 0: These new numbers are negative numbers.

4. We can use our number lines to work out the sums which include negative numbers. We start at -3 First we locate -3 on the number line.

5. We can use our number lines to work out the sums which include negative numbers. We start at -3

6. We can use our number lines to work out the sums which include negative numbers. We start at -3 Next we count on 5 places to the right. After 5 jumps we arrive at 2