I assume that you are either adding everything together, or multiplying everything. (Answers.com tends to eliminate several signs from the original question.)
Since you are only changing the order of two factors, that would be the commutative property.
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You can solve distributive property problems, by doing this: Let's say your problem is 27+12. You start by doing this: What factor goes into 27? Wait... what Greatest Common Factor belongs to 27? It's 9. So, what you do is this: 3(9+?) 3*? equals 12? 3*4= 12. So it's 4. So, 3(9+4) 9+4= 13 3*13= 39 27 +12 equals 39
Commutative Property of Addition
Commutative Property of Addition
12 ÷ 4/9 = 27
4 + 9 - 12 = 1