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*. 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 pages

All content from Kiddle encyclopedia articles (including the article images and facts) can be freely used under Attribution-ShareAlike license, unless stated otherwise. Cite this article:

Opposite number Facts for Kids. *Kiddle Encyclopedia.*