Question

A student solved this problem and said the answer was 1 5/12 cups.

Susie used 2 3/4 cups of milk to make milkshakes and 1 1/3 cups of milk to make pancakes. What is the total amount of milk Susie used?

Is the student's answer reasonable?

A.
Yes, the answer is reasonable.

B.
No, the answer is not reasonable. It should be about 1 cup.

C.
No, the answer is not reasonable. It should be about 3 1/4 cups.

D.
No, the answer is not reasonable. It should be about 4 cups.

Answer 1

If she used 2 3/4 cup and 1 1/3 cup you need to add.

2 3/4 = 2 9/12

1 1/3= 1 4/12

2 9/12+ 1 4/12 = 3 13/12 or 4 1/12

So the answer is D. The answer is not reasonable and it's about 4 cups.