Question

If 12 + _ = 0 + 12, then _ must equal:A: 120B: 12C: 1D: 10E: 0

Answer 1

1) Examining this equality 12 + _ = 0 + 12 we can see that this the 0 is the neutral element then applying the Commutative Property we can state that:

12 +0 = 0+12

2) Because the order of the addends does not alter the sum.

E