# Subtracting negative numbers review

Review the basic of subtracting negative numbers and try some practice problems.

## Subtracting negative numbers

Subtracting a number is the same as adding the opposite of the number.

Let's look at two examples:

Note: In both examples, we change subtraction to addition and changed the sign of the second number to the opposite sign.

*Want to know why this works? Check out this video.*

Once we have an addition problem, we can solve.

### Example 1: negative negative

Lets subtract .

Step 1: Rewrite as an addition problem

Step 2: Start at the first number in the addition problem, in this case :

Step 3: Move places to the

**right**. We move to the**right**because**adding positive increases**our number by . takes us to on the number line.

### Example 2: negative positive

Lets subtract .

Step 1: Rewrite as an addition problem

Step 2: Start at the first number in the addition problem, in this case :

Step 3: Move places to the

**left**. We move to the**left**because**adding negative decreases**our number by . takes us to on the number line.

*Want to learn more about subtracting negative numbers? Check out this video.*