Lesson 19: Elapsed Time Problems, Activity Finding Elapsed Time — Practice Questions

1. 1. A batch of cookies goes into the oven at 3:10 p.m. and is taken out at 3:50 p.m. The cookies baked for ___ minutes.

2. 2. A family started watching a movie at 7:30 p.m. and it ended at 9:05 p.m. What was the total length of the movie?

   • A. 1 hour and 25 minutes
   • B. 1 hour and 35 minutes
   • C. 2 hours and 5 minutes
   • D. 1 hour and 45 minutes

3. 3. A bike ride starts at 8:45 a.m. and finishes at 10:25 a.m. The ride lasted for 1 hour and ___ minutes.

4. 4. A bus journey begins at 10:50 a.m. and finishes at 1:20 p.m. How long was the journey?

   • A. 2 hours and 30 minutes
   • B. 3 hours and 30 minutes
   • C. 2 hours and 10 minutes
   • D. 3 hours and 10 minutes

5. 5. Which statement correctly identifies a common mistake when calculating elapsed time?

   • A. Counting the minutes to the next hour is an unreliable method.
   • B. Subtracting times like decimal numbers (e.g., $5.15 - 3.45$) gives the correct answer.
   • C. Forgetting that time is based on 60 minutes per hour can lead to errors.
   • D. Adding the hours before the minutes always results in a mistake.

6. 6. A movie started at 10:50 AM and ended at 12:15 PM. The total elapsed time was 1 hour and ___ minutes.

7. 7. Leo started his homework at 8:30 PM and finished at 10:05 PM. How long did he work on his homework?

   • A. 1 hour and 5 minutes
   • B. 1 hour and 35 minutes
   • C. 2 hours and 5 minutes
   • D. 2 hours and 35 minutes

8. 8. A soccer practice began at 4:15 PM and finished at 5:05 PM. The practice lasted for ___ minutes.

9. 9. To find the elapsed time from 3:45 PM to 5:20 PM using the 'jumping' method, what is a good first jump to make?

   • A. Jump 15 minutes to 4:00 PM
   • B. Jump 1 hour to 4:45 PM
   • C. Jump 20 minutes to 4:05 PM
   • D. Jump 15 minutes to 3:30 PM

10. 10. A bus trip starts at 6:55 AM and ends at 9:20 AM. The total trip duration is 2 hours and ___ minutes.