7 + 5 + 4 + 5 + 3 + 4 + 6 + 5 + 4 + 5 + 6 + 4 + 7 = 65
16?
-7
-5+7--4+12 = 18
102
-4 + 5 + (-7) = -6
3 + 4 + 7 = 14
9 + 4 + 7 + 8 = 28
Commutative property of addition. :)
The commutative property
16 + 2 + 9 + 4 + 7 + 8 is = 18 + 9 + 4 + 7 + 8 = 27 + 4 + 7 + 8 = 31 + 7 + 8 = 38 + 8 = 46
The problem of -5 plus 7 - (-4 plus -12) is equal to 18.