additive inverse
Noun 1. (mathematics) one of a pair of numbers whose sum is zero; the additive inverse of -5 is +5 (hypernym) inverse, opposite (classification) mathematics, math, maths | ||||
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Additive inverse Definition from Encyclopedia Dictionaries & Glossaries
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Additive inverse
In mathematics, the additive inverse, or opposite, of a number n is the number that, when added to n, yields zero. The additive inverse of n is denoted −n.
For example, the additive inverse of 7 is −7, because 7 + (−7) = 0, and the additive inverse of −0.3 is 0.3, because −0.3 + 0.3 = 0.
The additive inverse of a number is defined as its inverse element under the binary operation of addition. It can be calculated using multiplication by −1; that is, −n = −1 × n.
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