HEEEEEEEEEEEEELLLLLLLLLP
Which property is shown?
(8 + 1) + 9 = 8 + (1 + 9)

Question

HEEEEEEEEEEEEELLLLLLLLLP
Which property is shown?
 (8 + 1) + 9 = 8 + (1 + 9)

anonymous · Answer

Commutative Property is the one that refers to moving stuff around. 
For addition, the rule is "a + b = b + a";

directrix · Answer

The Commutative Prop of Addition has to do with order.
In the problem, the three integers are in the same order on both sides of the equation.

8, 1, 9  and 8, 1, 9

directrix · Answer

The Associative Property of Addition has to do with grouping.

In the posted problem,  (8 + 1) + 9, the 8 and 1 were grouped together.

On the right side of the equation, 8 + (1 + 9), the 1 and the 9 are grouped.

Take a look at the attached chart.  @jinxhead20