There is nothing magical about Subtraction, it is a form of Addition. It is the Addition of the opposite of the [b]subtrahend[/b] to the [b]minuend[/b]. The result is the same as the difference between the number.

[b]Minuend:[/b] The first number in a subtraction. The number from which another number (the Subtrahend) is to be subtracted.[br][b]Subtrahend:[/b] The number that is to be subtracted. The second number in a subtraction.[br][b]Difference:[/b] The result of subtracting one number from another. How much one number differs from another.[br][br][b]Minuend - Subtrahend = Difference[/b]