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3. multiplication-an arithmetic operation that is the inverse of division; the product of two numbers is computed; the multiplication of four by three gives twelve; four times three equals twelve. times. arithmetic operation-a mathematical operation involving numbers.
Addition and multiplication of integers can be defined in terms of the equivalent operations on the natural numbers; denoting by [(a, b)] the equivalence class having (a, b) as a member, one has: The negation (or additive inverse) of an integer is obtained by reversing the order of the pair: