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Mathematics 18 Online
OpenStudy (anonymous):

Scout’s Highway runs for 45 miles from Canton to Laurel, and then continues from Laurel 419 miles to Waverly. Use front end estimation to estimate the total distance that the road covers from Canton to Waverly. 470 mi 440 mi 480 mi 450 mi

OpenStudy (anonymous):

Round 419 to 420 and 45 to 50 and add them. 420 + 50 = 470.

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