## Math Basics## Basic Mathematical Operations |

## How do you subtract numbers? |

Subtraction is the “opposite” (or in set theory, the inverse) of addition: In its simplest form, one whole number is essentially taken away from another whole number. When you subtract numbers, you are answering the question of how many are left. For example, if 23 people leave a building that has 123 people (123 - 23), there would be 100 people left in the building.