Math worksheet for calculating elapsed time using a table format.

To complete the table, we need to calculate the missing Start Time, End Time, or Elapsed Time for each row.

Here is how we do it:
- If we have End Time and Elapsed Time, subtract the elapsed time from the end time to get the Start Time.
- If we have Start Time and Elapsed Time, add the elapsed time to the start time to get the End Time.
- If we have Start Time and End Time, subtract the start time from the end time to get the Elapsed Time.

Let’s go row by row:

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Row 1:
End Time = 12:33 P.M.
Elapsed Time = 1 hour 33 minutes
→ Start Time = 12:33 P.M. minus 1h33m
12:33 - 1 hour = 11:33
11:33 - 33 minutes = 11:00 A.M.

✔ Start Time = 11:00 A.M.

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Row 2:
End Time = 7:35 A.M.
Elapsed Time = 3 hours 15 minutes
→ Start Time = 7:35 A.M. minus 3h15m
7:35 - 3 hours = 4:35
4:35 - 15 minutes = 4:20 A.M.

✔ Start Time = 4:20 A.M.

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Row 3:
Start Time = 3:00 A.M.
End Time = 4:34 A.M.
→ Elapsed Time = 4:34 - 3:00 = 1 hour 34 minutes

✔ Elapsed Time = 1 Hour & 34 Minutes

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Row 4:
End Time = 10:34 P.M.
Elapsed Time = 2 hours 34 minutes
→ Start Time = 10:34 P.M. minus 2h34m
10:34 - 2 hours = 8:34
8:34 - 34 minutes = 8:00 P.M.

✔ Start Time = 8:00 P.M.

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Row 5:
Start Time = 10:40 A.M.
End Time = 2:16 P.M.
We break this into parts:
From 10:40 A.M. to 12:40 P.M. = 2 hours
But we only go to 2:16 P.M., so let’s do step-by-step:

From 10:40 A.M. to 12:40 P.M. → 2 hours
From 12:40 P.M. to 2:16 P.M. → 1 hour 36 minutes? Wait — better way:

Total from 10:40 A.M. to 2:16 P.M.:

Hours: From 10:40 to 2:40 would be 4 hours, but we stop at 2:16, which is 24 minutes before 2:40.

So: 4 hours - 24 minutes = 3 hours 36 minutes

Alternatively:
From 10:40 to 11:40 → 1 hr
11:40 to 12:40 → 1 hr (total 2)
12:40 to 1:40 → 1 hr (total 3)
1:40 to 2:16 → 36 minutes
Total = 3 hours 36 minutes

✔ Elapsed Time = 3 Hours & 36 Minutes

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Row 6:
Start Time = 1:00 P.M.
End Time = 3:55 P.M.
→ Elapsed Time = 3:55 - 1:00 = 2 hours 55 minutes

✔ Elapsed Time = 2 Hours & 55 Minutes

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Row 7:
End Time = 9:46 P.M.
Elapsed Time = 3 hours 26 minutes
→ Start Time = 9:46 P.M. minus 3h26m
9:46 - 3 hours = 6:46
6:46 - 26 minutes = 6:20 P.M.

✔ Start Time = 6:20 P.M.

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Row 8:
Start Time = 5:00 P.M.
End Time = 8:38 P.M.
→ Elapsed Time = 8:38 - 5:00 = 3 hours 38 minutes

✔ Elapsed Time = 3 Hours & 38 Minutes

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Row 9:
End Time = 5:00 P.M.
Elapsed Time = 3 hours 40 minutes
→ Start Time = 5:00 P.M. minus 3h40m
5:00 - 3 hours = 2:00
2:00 - 40 minutes = 1:20 P.M.

✔ Start Time = 1:20 P.M.

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Row 10:
Start Time = 9:40 P.M.
Elapsed Time = 4 hours 44 minutes
→ End Time = 9:40 P.M. + 4h44m
Add 4 hours: 9:40 + 4 = 1:40 A.M. (next day)
Then add 44 minutes: 1:40 + 44 min = 2:24 A.M.

Wait — let's check:

9:40 P.M. + 4 hours = 1:40 A.M.
1:40 A.M. + 44 minutes = 2:24 A.M.

✔ End Time = 2:24 A.M.

*(Note: Since it goes past midnight, we write “A.M.” for next day)*

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Now, compiling all answers in order as they appear in the table:

Row 1: Start Time = 11:00 A.M.
Row 2: Start Time = 4:20 A.M.
Row 3: Elapsed Time = 1 Hour & 34 Minutes
Row 4: Start Time = 8:00 P.M.
Row 5: Elapsed Time = 3 Hours & 36 Minutes
Row 6: Elapsed Time = 2 Hours & 55 Minutes
Row 7: Start Time = 6:20 P.M.
Row 8: Elapsed Time = 3 Hours & 38 Minutes
Row 9: Start Time = 1:20 P.M.
Row 10: End Time = 2:24 A.M.

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Final Answer:
11:00 A.M.
4:20 A.M.
1 Hour & 34 Minutes
8:00 P.M.
3 Hours & 36 Minutes
2 Hours & 55 Minutes
6:20 P.M.
3 Hours & 38 Minutes
1:20 P.M.
2:24 A.M.