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Speedy Problems
Use appropriate tools to solve the following problems.
- A salesperson has to drive 500 miles. For the first three hours she drove at 65 miles per hour. For the next two hours she drove at 55 miles per hour. How many more miles does she have left to drive?
- John bicycles for 2 hours at a speed of 15 miles per hour. How many hours will it take Shannon to cover the same distance at a speed of 10 miles per hour?
- A truck driver drives 1000 miles. The truck uses a gallon of diesel fuel for every 15 miles. About how many gallons of fuel are needed?
- One Earth Day, four workers planted 500 white pine seedlings. Each worker could plant 25 trees an hour. How many hours did it take to plant all 500 trees?
- A teacher wants to interview each of his students. He needs 15 minutes for each interview. How long will it take him to interview all 25 students in his class in hours and minutes?
- Alexis, Ana, and Felicia each ate fractions of pie for dessert. Alexis ate
of a pie. Ana ate 
of a pie. Felicia ate 
of a pie.
- If all the pies were the same size, who ate the most pie? Explain.
- Who ate the least pie? Tell how you know.
- Lin, Manny, and Arti each bought the same size box of pencils. One month later,
of Lin's pencils are missing. 
of Manny's pencils are missing. 
of Arti's pencils are missing. - Who lost the most pencils?
- Who lost the least number of pencils?