Question

How could you solve this problem?

4 × 9 × 5
Check all that are true.

Multiply 4 × 9 to get 36 and then multiply 36 × 5.

Multiply 9 × 5 to get 45 and then multiply 45 × 4.

Multiply 4 × 9 to get 36, multiply 9 × 5 to get 45, and then multiply 36 × 45.

Multiply 4 × 9 to get 36 and then multiply 36 × 45.

Multiply 9 × 5 to get 45 and then multiply 45 × 36.

Answer 1

I do A and B but that is the way I learned it. Hope this helps :)

Answer 2

the first two are the only ones that are true