



 
Hi Terry, The commutative property states that for any numbers a and b, a*b = b*a. The associative property states that for any numbers a, b and c, a*(b*c) = (a*b)*c. To show that 5*(7*2) = (7*5)*2 you need to use two steps. First shift the parentheses using the associative property.
Now use the commutative property inside the parentheses on the right to get
I hope this helps,  


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