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The additive inverse of a number is the opposite of that number, that is, the additive inverse of a number x is -x. The sum of a number and its additive inverse is always zero, that is, x + (-x) = 0. Related Terms: addition, number, opposites, sum, zero. English | Espaol.
This motivates the following formal definition. Additive Inverse: For every integer n, there is a unique integer m such that n + m = m + n = 0. The integer m is called the additive inverse of n. This property of integers is called the inverse property for integer addition. Examples: Find the additive inverse for each of the following integers.