Question

Adriana uses models to compare two decimal numbers. She says 0.53 is greater than 0.7 because 53 > 7.

A square partitioned into one hundred equal parts with fifty three parts shaded. To the right is a square partitioned into ten equal parts with seven parts shaded.

Which of these explains Adriana's mistake? (3 points)

a
Adriana incorrectly compared hundredths to tenths. She should compare 53 hundredths to 70 hundredths.
b
Adriana incorrectly compared tenths. She should compare 5 hundredths to 3 hundredths.
c
Adriana incorrectly shaded the models. She should shade seven more hundredths.
d
Adriana incorrectly counted the number of shaded parts in the models. She should compare 6 shaded parts to 7 shaded parts.

Answer 1

A is your answer.

Explanation:

.7 is the same as .70 and .70 is to the left of .53, indicateing that she incorrectly compared the hundreths to the tenths.