It's the inverse operation. 3 + 6 = 9, 9 - 6 = 3
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Subtracting a number, y, from to another number, x, is the same as adding its additive inverse to it.
That is, x - y = x + (-y)
Addition, subtraction and multiplication.
Addition and subtraction are reverse operations.
they both have something to do with positive and negative
They are different in the same way that subtraction of integers is different from their addition.
The rules for addition are as follows:The sum of two negative integers is a negative integerThe sum of two positive integers is a positive integerThe rules for subtraction are as follows:If they are two positive numbers, do it normallyIf there is a negative and a positive ,change it to addition and switch the SECOND integer sign