Additive inverse

//ˌæd.ə.t̬ɪv ˈɪn.vɝːs// noun

Definitions

Noun
  1. 1
    The inverse with respect to addition; the opposite.

    "The additive inverse of 12 is −12."

  2. 2
    (mathematics) one of a pair of numbers whose sum is zero; the additive inverse of -5 is +5 wordnet

Etymology

So-called because the sum of a number and its additive inverse is the additive identity.

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