Let's solve the elapsed time problems in the table. The goal is to calculate how much time has passed between the
Start Time and
End Time, rounding to the
nearest half hour.
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🔍 Step-by-step method:
To find
elapsed time:
1. Subtract the start time from the end time.
2. Round the result to the nearest
half hour (e.g., 35 minutes → 30 minutes, 40 minutes → 45 minutes).
We’ll go row by row.
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✔ Row 1:
- Start: 8:00 A.M.
- End: 10:30 A.M.
- Elapsed: 10:30 - 8:00 =
2 hours 30 minutes → Already given ✔️
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✔ Row 2:
- Start: 10:00 P.M.
- End: 11:30 P.M.
- Elapsed: 11:30 - 10:00 =
1 hour 30 minutes
✔ Answer:
1 hour and 30 minutes
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✔ Row 3:
- Start: 2:00 P.M.
- End: 5:00 P.M.
- Elapsed: 5:00 - 2:00 =
3 hours
✔ Answer:
3 hours
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✔ Row 4:
- Start: 12:30 P.M.
- End: 7:00 P.M.
- From 12:30 to 7:00 is:
- 12:30 to 1:30 = 1 hour
- 1:30 to 7:00 = 5 hours
- Total =
6 hours 30 minutes
✔ Answer:
6 hours and 30 minutes
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✔ Row 5:
- Start: 4:00 A.M.
- End: 11:00 A.M.
- Elapsed: 11:00 - 4:00 =
7 hours
✔ Answer:
7 hours
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✔ Row 6:
- Start: 3:00 P.M.
- End: 9:30 P.M.
- Elapsed: 9:30 - 3:00 =
6 hours 30 minutes
✔ Answer:
6 hours and 30 minutes
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✔ Row 7:
- Start: 4:30 P.M.
- End: 6:00 P.M.
- Elapsed: 6:00 - 4:30 =
1 hour 30 minutes
✔ Answer:
1 hour and 30 minutes
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✔ Row 8:
- Start: 12:00 A.M. (midnight)
- End: 12:00 P.M. (noon)
- This is
12 hours exactly.
✔ Answer:
12 hours
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✔ Row 9:
- Start: 1:00 P.M.
- End: 1:30 P.M.
- Elapsed: 1:30 - 1:00 =
30 minutes
✔ Answer:
30 minutes
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📊 Final Completed Table:
| Start Time | End Time | Elapsed Time |
|----------------|----------------|--------------------------|
| 8:00 A.M. | 10:30 A.M. | 2 hours and 30 minutes |
| 10:00 P.M. | 11:30 P.M. |
1 hour and 30 minutes |
| 2:00 P.M. | 5:00 P.M. |
3 hours |
| 12:30 P.M. | 7:00 P.M. |
6 hours and 30 minutes |
| 4:00 A.M. | 11:00 A.M. |
7 hours |
| 3:00 P.M. | 9:30 P.M. |
6 hours and 30 minutes |
| 4:30 P.M. | 6:00 P.M. |
1 hour and 30 minutes |
| 12:00 A.M. | 12:00 P.M. |
12 hours |
| 1:00 P.M. | 1:30 P.M. |
30 minutes |
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✔ All answers are rounded to the nearest half-hour (no need to round further since all results are already at half-hour intervals).
Let me know if you'd like this as a printable version or want explanations for any specific row!
Parent Tip: Review the logic above to help your child master the concept of elapsed time super teacher worksheet.
