Question

Ellie and her family are driving to her grandmother’s house. The drive takes 2 4/5 h total. Ellie and her family have completed 3/5 of the drive.

About how many hours have Ellie and her family been driving?

Estimate by first rounding each number to the nearest 1/2 .

A.3/4h


B.1h


C.1 1/4h


D.1 1/2h

Answer 1

Look at the fraction 4/5 which is part of the mixed numeral 2 4/5.
Is 4/5 closer to 1/2 or to 1?

Answer 2

1

Answer 3

Correct.
The mixed numeral 2 4/5 is the same as 2 + 4/5.
Since 4/5 is closer to 1 than to 1/2, and the problem tells you to first round off the numbers to the nearest 1/2, then we use 1 for 4/5.
That means that 2 4/5 should be rounded to 2 + 1.
What is 2 + 1?

Answer 4

3

Answer 5

Great. In our estimation, we will use 3 for 2 4/5.
Now we need to deal with 3/5.
Is 3/5 closer to 1 or to 1/2?

Answer 6

1/2?