Question

Fill in the blank:
1. ___+ (-9) = 8
2. ___+ 12 = 6

Answer 1

1 . 17

2. -6

Explanation:

because

17 - 9 = 8

-6 + 12 = 6

Answer 2

1. 17 + (-9) = 8
2. (-6)+ 12= 6