Select the proper placement for parentheses to speed up the addition for the expression 4 + 6 + 5



A. 4 + (6 + 5)
B. (5 + 4) + 6
C. (4 + 6) + 5
D. (5 + 6) + 4

Respuesta :

C, because everyone (hopefully) knows 6+4 is ten.