Question

Diem said that the quotient of 4.2 /5 is about 8 tenths because 4.⅖ is close to 40 tenths/5. Do you agree with Diem’s reasoning? Explain why or why not.

Answer 1

9514 1404 393

Answer:

yes, 42/10 is near 40/10

Explanation:

(4.2)/5 is (42/10)/5, which is about (40/10)/5, which is 8/10.

I might think of it as (4.2)/5 is about 4/5, which is 8/10.

Diem's reasoning is good, and his estimate of the answer is appropriate.