Addition is commutative. That is, a + b = b + a for all a, b
Wiki User
∙ 2009-09-03 10:48:47distributive
20 = 400
12 of course !
12 + 16 + 18 + 20 + 9 = 75
10 plus 10 equals 20 20 divide by 10 equals 2 2 plus 10 equals 12
A=20 20+12=32 32divided by 4 = 8
any number plus 0 equals the previously said number 20+0=20 demonstrates the zero property
I come up with 20.
4
-12
20+6=6+20
(12 + 8) + 3 = 12 + (8 + 3)20 + 3 = 12 + 1123 = 23 ■