👉 In mathematics, subtraction is a mathematical operation that involves taking away. It can be used to subtract quantities of numbers or expressions. For example, if you have two numbers, 12 and 30, you could subtract them by adding their absolute values (since they are the same number): ``` 12 - 30 = -18 ``` So in this case, -18 is the result of subtracting 12 from 30.
