stephaniesaiz stephaniesaiz 07-10-2016 Mathematics contestada 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