Question

What plus three is zero?

Answer 1

So remember the Additive Inverse Property, which states that a number and it's additive inverse is equal to zero. To find the additive inverse of a number, just change the sign of the number (positive to negative or negative to positive).

In this case, the additive inverse of 3 is -3, hence making -3 your answer.

Answer 2

-3 that's the answer you want