What property is shown by the equation?
Column A
1.
(–22 + 17) + 13 = –22 + (17 + 13)
2.
–(27 + (–3)) = –27 + 3
3.
35 + (–15 + 4) = (35 + (–15)) + 4
4.
–12 + 6 = 6 + (–12)
column B
a. commutative property
b. associative property
c. opposite of a sum property
