# ACT Math : How to subtract negative numbers

## Example Questions

### Example Question #1 : Negative Numbers

What is 1 + (–1) – (–3) + 4 ?

9

1

3

6

7

7

Explanation:

You simplify the expression to be 1 – 1 + 3 + 4 = 7

### Example Question #2 : How To Subtract Negative Numbers

Solve the following equation for :

Explanation:

To begin, we need to recall how to subtract negative numbers. Remember, when subtracting a negative number, the two negatives cancel out, creating a positive.

So, this:

Becomes this:

We can combine like terms on the left to get:

Then, we can subtract  from both sides in order to get  by itself:

In this case, we are subtracting from a negative number, which is just like adding two negative numbers, or subtracting from a positive number. The result will be more negative, because we will be moving further to the left on the number line.

### Example Question #1 : Describe Situations In Which Opposite Quantities Combine To Make 0: Ccss.Math.Content.7.Ns.A.1a

Compute the following: