Question

Explain why 20 + (-12) + 12 is the same as 20 + 0??

Answer 1

-12 and 12 result in the number zero just like the second problem. Hope that makes sense :)

Answer 2

Its the same because you add 12 to the first one, then you take back the 12. So its like you added nothing. And in the second one, you add zero

Explanation: