We are going to work out:

-7+10

The first number tells us WHERE WE START.

The second number tells us WHAT WE DO.

In this case, we start at -7, then go forward 10.

Let’s draw the number line:

We know that 10 is bigger than 7. That means we will be going past zero.

We need to go forward 10. Let’s draw an arrow to show that.

From -7 to zero, we went up by 7. You can see this here:

But we need to go forward by 10. This means we have to go forward by 3 more:

3 more than zero is positive 3. So that’s our final answer:

Practice Questions

Try this method with these questions. The answers are provided below.

-5 + 8
10 - 16
-3 - 4

Answers

-5 + 8 = 3
10 - 16 = -6
-3 - 4 = -7