Question

What number should be added to 17 to make the sum 0? 0 –16 17 –17

Answer 1

Hi.

If a number and it's opposite are added, the sum will always be 0.

~

Answer 2

The answer is -17, because its a negative so it's below zero. So, adding 17 (positive number) will bring it towards zero instead of farther down. -17 is the answer, because if you used -16 it'll pass zero, ending at 1.