Answers

2014-06-23T16:43:44+08:00
1.) associative property of addition 
2.) commutative property of addition
3.) identity property of addition 

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2014-06-23T17:12:37+08:00
1.associative property of addition(APA) 
2.commutative property of addition(CPA)
3.identity property of addition(IPA)
4.distributive property of addition(DPA)
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