The rules for addition are as follows:
The rules for subtraction are as follows:
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Addition, subtraction and multiplication.
They are different in the same way that subtraction of integers is different from their addition.
Placing a question mark at the end of a phrase does not make it a sensible question. Try to use a whole sentence to describe what it is that you want answered. Your "question" sheds no light on what rules for integers you are interested in: rules for addition, subtraction, and so on; rules for multiplying numbers with integer indices, and so on.
Inverse and idenity
Addition, subtraction, multiplication and division