# How do you simplify #-3+9-12#?

##### 2 Answers

#### Explanation:

To simplify the equation you have to combine like terms. In this case they are all like terms: (

They are all numbers without variables.

Add

You add the negative terms together to make

Therefore the simplified expression is (

You can then do the subtraction and end up with

#### Explanation:

If you want to apply BODMAS, PEDMAS etc, be careful no to fall into the mistake of thinking that the addition is

TO avoid this type of error, re-arrange the expression with any additions at the beginning with the subtractions following:

Or working from left to right gives: