-.8
If you mean 16 plus 24/6 then it is 20
18+24+16+22 42+38 =80
16 plus 8 equals 24.
16 + 3 + 5 = 24
52
24
24 + (-8) = 16
16
16 + 24/2 = 28/1 or 28
8
It is the commutative property as well as the associative property. Without the second, the equality need not hold.
7b + 16 = 5b + 247b - 5b = 24 - 162b = 8b = 4