Which of the following equation shows the associative property of addition? Mark all that apply

A

6.5+25=25+6.5

B

15+1=1+2.7

C

(0.75+12) + 2.1=0.75 + (12+2.1)

D

-5.3+0=-5.3

E

23 + (3.1+14) = (23+3.1) + 14

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