Question

Alexia ran three laps around her neighborhood. Each lap is 1 and StartFraction 3 over 8 EndFraction miles. Which is the best estimate of the number of miles that Alexia ran?

2 miles
3 and one-half miles
4 and one-half miles
6 miles

Answer 1

4 and one-half miles

Explanation:

The answer closest to the correct answer is 4 and one-half miles.

To get the answer, you multiply 3 times the length of one lap which is 1 and
`(3)/(8)` miles. To multiply the fraction, you take 3 times the top number in the fraction. So 3 x 1
`(3)/(8)` = 3
`(9)/(8)`. The fraction can actually be reduced to 1 and
`(1)/(8)` miles. So you're total correct answer is 4 and
`(1)/(8)` miles.

The second selection is 3 and
`(1)/(2)` which can also be written as 3 and
`(4)/(8)` to make it easier to determine which answer is correct. The second answer is therefore
`(5)/(8)` shorter than the correct answer.

The third selection is 4 and
`(1)/(2)` which can be written as 4 and
`(4)/(8)` so it is only
`(3)/(8)` longer than the correct answer. So this selection is the closest to the actual miles ran.