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Mathematics 20 Online
OpenStudy (anonymous):

9*(r*21)

OpenStudy (anonymous):

first use the commutative property of multiplication 9*(r*21) =9*(21*r) then use associative property of multiplication 9*(21*r) =(9*21)*r then simplify

OpenStudy (anonymous):

|dw:1347823785876:dw| example 8(r10)= 80r

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