Question

Fill the additive inverse of:
$-9$

Answer 1

Additive inverse of a number is a number when added to original number yields result $0$.

So, let's assume additive inverse of $-9$ is $x$

So, according to definition of additive inverse

$-9+x=0$

$\therefore x=9$

$\therefore$ Additive inverse of $-9$ is $9$