18 + 16 = 34
The Answer is Commutative Property
-6
9 + 8 + 16 + 17 + 18 = 68
-a + 2 = 18 - 2 = - 2 --------------- - a = 16 a = - 16
18
2+14=16
12 + 23 + 45 + 67 + 16 + 18 + 45 = 226
1
60.
No.
There are infinitely many possible answers. 1.5 + 2.5 + 18 = 10 + 0 + 12