Additive Inverse Definition
noun
The number that must be added to a number to equal zero.
−5 is the additive inverse of 5
Webster's New World
Other Word Forms of Additive Inverse
Noun
Singular:
additive inverse
Plural:
additive inversesOrigin of Additive Inverse
So called because the sum of a number and its additive inverse is the additive identity.
From Wiktionary
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