Question

Find the additive inverse of the number

$-18$

Answer 1

Additive inverse: An additive inverse of a number is defined as the value, which on adding with the original number results in zero value.

Suppose, $a$ is the original number, then its additive inverse will be minus of $a$ i.e., $-a$, such that; $a+(-a)=a–a=0$

Here, $a=-18$, then$-a=-(-18)=18$, so that,

$-18+18=0$

Hence, the additive inverse of $-18$ is $+18$.