###### Asked in Math and ArithmeticAlgebra

# Find the sum of the opposite of -18 and its additive inverse?

## Answer

###### ihonestlydontcare

###### November 07, 2019 11:57PM

###### Wiki User

###### January 06, 2013 3:26AM

The additive inverse of -18 is +18.

Hence if you want to add them,

Remember the additive inverse of a negative number will be its positive.

Its simple, just remove the negativity symbol. So -5 additive inverse is +5.

And for a positive number just put a negativity symbol in front of it. :D.

Hence +10 will become -10.

**Remember the additive inverses always add up to give
zero!!**

Therefore you can always use this way to find the answer of your question.

Let the additive inverse of -18 be X.

**As the law states, they add up to 0**

-18 + X = 0

X = 0- (-18)

X = 0+18

X = 18

Coming to the next part of your question,

the opposite of -18 is simply the additive inverse!!!

Therefore its 18!!

Hence

18+18=36!

Hope that helps buddy!!