additive inverseadditive inverse
The definition of an additive inverse is the number needed to bring a negative number to zero.
An example of an additive inverse is the number 30 when added to -30.
the number that must be added to a number to equal zero: ?5 is the additive inverse of 5
(plural additive inverses)
So called because the sum of a number and its additive inverse is the additive identity.