Find the additive inverse of $+12$.

Find the additive inverse of $-17$.

Evaluate: $\left(-11\right)+\left(+11\right)$

Evaluate: $\left(+9\right)+\left(-9\right)$

Evaluate: $\left(+13\right)+\left(-13\right)$

Write the suitable answer in the given blank.

$\left|+11\right|=$ _____

Write the suitable answer in the given blank.

$\left|-13\right|=$ _____

Write the suitable answer in the given blank.

$\left|-47\right|=$ _____

Write the suitable answer in the given blank.

$\left|12\right|=$ _____