Opposite number

number that, when added to the original number, yields zero

In mathematics, opposite number or additive inverse of any number is a number n which, if added to n, results in 0 (the identity element of addition). The opposite number for n is written as −n.[1][2][3] For example, −7 is the opposite number of 7, because .

For positive numbers, the opposite number is simply the negative version of the number. For negative numbers, the opposite number is the positive version of the number.

Related pagesEdit


  1. "Compendium of Mathematical Symbols". Math Vault. 2020-03-01. Retrieved 2020-08-27.
  2. Weisstein, Eric W. "Additive Inverse". mathworld.wolfram.com. Retrieved 2020-08-27.
  3. "Additive Inverse". www.learnalberta.ca. Retrieved 2020-08-27.