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Which statement shows the associative property of addition?



A.


If m + 3 = 18, then 18 = m + 3


B.


(u + 7) + 13 = u + (7 + 13)


C.


21 + 2y = 2y + 21


D.


3 · (5 · x) = (3 · 5) · x



Answer :

Curti
The answer is B (associative property of addition)
A is commutative property of addition
C is commutative property of multiplication
D is associative property of multiplication
vuvuong003
B is correct, associative property is property that switch the parentheses with the number around.
Ex: 4+(2-1) = (4+2) - 1. Look at those parenthesis, but when you do in operations PEMDAS , you will get both answer as 5.
A. commutative property, two number switch together still make equal number, only works for plus and multiply
Ex: 4 + 2 = 2 +4 , not 54 - 4 = 4 - 54
C. Commutative property also like A
 D. Assiocative of multiplication 

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