Question

. . What property is shown? . . . . –12 + (27 + 12) = –12 + (12 + 27).

Answer 1

The property that is shown in the expression given in the question is commutative property. The word commutative has basically been taken from the word "commute". This means moving around and in case of this problem, it means moving around for doing the addition and getting to the right answer. I hope it helps you.