what is addition and subtraction
Addition (often signified by the plus symbol +) is one of the four elementary, mathematical operations of arithmetic, with the others being subtraction, multiplication and division. The addition of two whole numbers is the total amount of those quantities combined. For example, in the picture on the right, there is a combination of three apples and two apples together; making a total of 5 apples.
Subtraction. In subtraction, a subtrahend is subtracted from a minuend to find a difference. In the following equation, 9 is the minuend, 3 is the subtrahend, and 6 is the difference.