Question

Error Analysis  Jennie has 5 cups of milk. A​ one-batch recipe for pancakes calls for three fourths cup
of milk. To see how many batches she could​ make, Jennie finds 5 divided by three fourths
. She said that because 5 divided by three fourths
equalsone fifth times four thirds
​, she could make four fifteenths of a batch
. What was her ​error? How many batches could she ​make?
Question content area bottom
Part 1
What was Jennie​'s ​error?
A.
She multiplied the dividend by the reciprocal of the divisor.
B.
She multiplied the dividend by the divisor.
C.
She multiplied the reciprocal of the dividend by the divisor.
D.
She multiplied the reciprocal of the dividend by the reciprocal of the divisor.

Answer 1

Jennie inverted both numbers instead of just the divisor. (She computed (1/5)·(4/3).) Answer: D.

Correct calculation: 5 ÷ 3/4 = 5 · 4/3 = 20/3 = 6 2/3 batches (about 6.67 batches).