Question

Select all of the expressions that are equal to 6 × 45.

A. 6 × (40 + 5)
B. 4 + 2 × 45
C. (6 × 40) + (6 × 5)
D. (6 + 40) × (6 + 5)
E. 6 × (20 + 25)

Answer 1

A and C.

Explanation:

Because 6x45=270. And if you look at the problem, 6x(40+5). Of course, you do the parentheses first. So 40+5= 45. Then 6x45. And once again, you get 270. Then for C, 6x40= 240. And, 6x5= 30. Then, add. 240+30= 270.