12+8+10+12+11+9 = 62
40
12 - 8 + 3 + 5 = 12
8 + 12 = 20
4 plus 8 plus 12 plus 16 is equal to 40.
-8 + 12 = 4
It is the associative property for the addition of numbers.
5 + 8 + 20 + 12 + 19 = 64
(12 + 8) + 3 = 12 + (8 + 3)20 + 3 = 12 + 1123 = 23 ■
first add 12 plus 12 equals 24, then add 4 plus 4 and that equals 8. 24 plus 8 equals 32. 12 + 12 = 24 4 +4 =8 24 + 8 =32
-8
-12