calling both and addends, it is more appropriate to call the "augend" in this case, since plays a passive role. The unary view is also useful when discussing subtraction, because each unary addition operation has an inverse unary subtraction operation, and vice versa.

Properties

Commutativity

Addition is commutative, meaning that one can change the order of the terms in a sum, but still get the same result. Symbolically, if and are any

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