Question

Tony wants to model the Associative property of addition using a number sentence. Which number sentence could be used for Tonys model?
A. 6+(4+5)=6+(5+4)
B. 8+7=8+7+0
C. 7+(3+6)=(7+3)+6
D. 8+7=9+6

Answer 1

A. 12=12
B. 15=15
C.16 = 16
D.15=15