The lengths of the five longest interstate
highways are listed.
Which two highways have a difference
of 440 miles? Explain how you can use
estimation to find your answer.
1-10: 2460 miles
1-40: 2555 miles
1-70: 2153 miles
1-80: 2900 miles
1-90: 3021 miles
if you round all of your numbers to the nearest 10th you can add and subtract 440 from your numbers till you find the match, let me know if that makes sense
