Which statement shows the associative property of addition?

Question

(A)21 + 2y = 2y + 21

(B)(u + 7) + 13 = u + (7 + 13) .
(C)If m + 3 = 18, then 18 = m + 3.

(D)3⋅(5⋅x)=(3⋅5)⋅x

Answer 1

Associative property of addition tells us :

a + b + c
= (a + b) + c = a + (b + c)

do you see that pattern?

Answer 2

I think it is A

Answer 3

Or B?

Answer 4

Are you just guessing????

compare:

(u + 7) + 13 = u + (7 + 13)
(a + b) + c = a + (b + c)

Answer 5

No, I am not guessing.

Answer 6

Ya B???

Answer 7

(×+7)+1= associaltive property