Additive Inverse

An additive inverse of a number is defined as the value, which on adding with the original number results in zero value. It is the value we add to a number to yield zero. Suppose, $a$ is the original number, then its additive inverse will be minus of a i.e.,$-a$, such that;

$a+(-a)=a-a=0$

Difference Between Additive Inverse and Multiplicative Inverse

Additive Inverse	Multiplicative Inverse
It is added to the original number to get 0	It is multiplied to the original number to get 1
Results in 0	Results in 1
Sign of the original number is changed and added	Reciprocal of the original number is multiplied
Example: $55+(-55)=0$	Example: $55\times {\frac {1}{55}}=1$