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Mathematics 21 Online
OpenStudy (anonymous):

(4+9)+3=4+(9+3) all i need to know is what kind of property this is

jimthompson5910 (jim_thompson5910):

This is using the associative property of addition

jimthompson5910 (jim_thompson5910):

http://www.purplemath.com/modules/numbprop.htm

OpenStudy (anonymous):

thank you :) hahah you're a big help

jimthompson5910 (jim_thompson5910):

lol you're welcome

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