Add and Subtract Positive and Negative Numbers

In this activity, we will be adding and subtracting positive and negative numbers.

Use the number ladder to help you to answer the questions.

Remember, for a positive number, move up the ladder.

For a negative number, move down the ladder.

Always begin at 0.

Example:

3 - 5

Start at 0, move up 3 spaces, then down 5 spaces.

The answer is -2

3 - 5 = -2

-4 - 3

Start at 0, move down 4 spaces, then down another 3 spaces.

The answer is -7

-4 -3 = 7

Let's have a go at some questions now.