Question

Which expression shows that 11 + 7 = 5 + 13?
A.
(5 + 6) + 7 = 5 + (6 + 7)
B.
6 + 6 + 6 = 18
C.
5 + 9 + 4 = 6 + 7 + 5
D.
(11 + 4) + 3 = (5 + 7) + 6

Answer 1

help

Answer 2

A. because you can break up the 11 to be 5+6 and the 13 to 6+7 to show that 5+6+7=5+6+7=18

Answer 3

thanks