Subtraction is the mathematical operation of taking one number away from another to find the difference between them. When you subtract 5 from 12, you're finding out how much is left: 12 minus 5 equals 7.

Think of subtraction as the opposite of addition. If you have 15 cookies and eat 6 of them, subtraction tells you how many remain: 15 - 6 = 9 cookies. If you're saving money and have $20, then spend $8 on a book, subtraction shows you have $12 left.

Subtraction appears constantly in everyday life. When you check how many pages you have left in a chapter, you're subtracting the pages you've read from the total. When you count down the days until your birthday, you're using subtraction. Sports scoreboards use it too: if one team has 45 points and another has 38, subtraction reveals the 7-point difference.

In a subtraction problem like 50 - 23 = 27, we call 50 the minuend (the number being subtracted from), 23 the subtrahend (the number being subtracted), and 27 the difference (the result). While you don't need those fancy terms for everyday math, understanding subtraction itself helps you solve countless real problems, from calculating change at a store to figuring out how much time you have before dinner.