Elapsed Time Worksheet for 3rd - 5th Grade | Lesson Planet - Free Printable

Let’s go row by row and calculate the missing elapsed time or start/end times.

We’ll use this method:
- If we have Start Time and End Time → subtract to get Elapsed Time.
- If we have Start Time and Elapsed Time → add to get End Time.
- If we have End Time and Elapsed Time → subtract to get Start Time.

Remember: 1 hour = 60 minutes. When adding or subtracting, handle hours and minutes separately, and borrow/carry as needed.

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Row 1:
Start: 3:30 am
End: 8:00 am
Elapsed: ?

From 3:30 am to 8:00 am:
→ From 3:30 to 4:00 = 30 min
→ From 4:00 to 8:00 = 4 hours
Total = 4 hours 30 minutes ✔ (already filled — correct)

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Row 2:
Start: 9:15 pm
End: ?
Elapsed: 3 hours 15 minutes

Add 3h15m to 9:15 pm:

9:15 + 3 hours = 12:15 am (next day)
12:15 + 15 minutes = 12:30 am

✔ So End Time = 12:30 am

*(Note: The worksheet says “2:30 pm” — that’s wrong. Let’s double-check.)*

Wait — if you add 3h15m to 9:15 pm:

9:15 pm + 3 hours = 12:15 am
+15 min = 12:30 am — NOT 2:30 pm.

But the worksheet already has “2:30 pm” written in End Time? That must be a mistake in the original sheet — or maybe I misread.

Looking back at user image description: Row 2 says:

Start: 9:15 pm
End: 2:30 pm ← This can’t be right unless it’s next day afternoon? But 9:15 pm to 2:30 pm next day is way more than 3h15m.

Actually — let’s recalculate what elapsed time would be from 9:15 pm to 2:30 pm next day:

From 9:15 pm to midnight = 2h45m
Midnight to 2:30 pm = 14h30m
Total = 17h15m — not 3h15m.

So either the End Time is wrong, or the Elapsed Time is wrong.

But the problem says “Fill in the missing pieces”, and in Row 2, both End Time and Elapsed Time are given? Wait no — looking again:

In the table provided in the prompt:

Row 2:
Start Time: 9:15 pm
End Time: 2:30 pm ← this is likely a typo? Or perhaps it's 12:30 am?

Wait — actually, re-examining the original table structure from your text:

You wrote:

| Start Time | End Time | Elapsed Time |
|------------|--------------|--------------------|
| 3:30 am | 8:00 am | |
| 9:15 pm | | 3 hours 15 minutes |
| | 2:30 pm | 1 hour 15 minutes |
| ... | ... | ... |

Ah! I see — in Row 2, End Time is blank, and Elapsed Time is given. In Row 3, Start Time is blank, End Time and Elapsed are given.

So correction:

Row 2:
Start: 9:15 pm
Elapsed: 3h15m
→ End = 9:15 pm + 3h15m = 12:30 am ✔

Row 3:
End: 2:30 pm
Elapsed: 1h15m
→ Start = 2:30 pm - 1h15m

2:30 minus 1 hour = 1:30 pm
1:30 minus 15 minutes = 1:15 pm

✔ Start Time = 1:15 pm

---

Row 4:
Start: 6:30 am
End: 9:45 am
Elapsed: ?

9:45 - 6:30 = 3 hours 15 minutes ✔ (given — correct)

---

Row 5:
Start: 3:00 pm
End: ?
Elapsed: 4 hours 30 minutes

3:00 pm + 4h = 7:00 pm
+30 min = 7:30 pm

✔ End Time = 7:30 pm

---

Row 6:
Start: ?
End: 10:00 pm
Elapsed: 2 hours 30 minutes

10:00 pm - 2h30m = ?

10:00 - 2 hours = 8:00 pm
8:00 - 30 minutes = 7:30 pm

✔ Start Time = 7:30 pm

---

Row 7:
Start: 3:15 am
End: 7:30 am
Elapsed: ?

7:30 - 3:15 = 4 hours 15 minutes ✔ (given — correct)

---

Row 8:
Start: 9:45 pm
End: ?
Elapsed: 9 hours 15 minutes

9:45 pm + 9h15m

First, 9:45 pm + 9 hours = 6:45 am (next day)
+15 minutes = 7:00 am

✔ End Time = 7:00 am

---

Row 9:
Start: ?
End: 4:15 am
Elapsed: 2 hours 30 minutes

4:15 am - 2h30m = ?

4:15 - 2 hours = 2:15 am
2:15 - 30 minutes = 1:45 am

✔ Start Time = 1:45 am

---

Row 10:
Start: 11:00 pm
End: 9:45 am
Elapsed: ?

From 11:00 pm to midnight = 1 hour
Midnight to 9:45 am = 9 hours 45 minutes
Total = 10 hours 45 minutes ✔ (given — correct)

---

Row 11:
Start: 12:45 am
End: ?
Elapsed: 1 hour 30 minutes

12:45 am + 1h30m = 2:15 am

✔ End Time = 2:15 am

---

Row 12:
Start: ?
End: 1:00 am
Elapsed: 6 hours 15 minutes

1:00 am - 6h15m = ?

Go backward:

1:00 am minus 6 hours = 7:00 pm (previous day)
7:00 pm minus 15 minutes = 6:45 pm

✔ Start Time = 6:45 pm

---

Now, let’s list all the missing values we calculated:

Row 2: End Time = 12:30 am
Row 3: Start Time = 1:15 pm
Row 5: End Time = 7:30 pm
Row 6: Start Time = 7:30 pm
Row 8: End Time = 7:00 am
Row 9: Start Time = 1:45 am
Row 11: End Time = 2:15 am
Row 12: Start Time = 6:45 pm

All others were already correctly filled.

Final Answer:

The missing values are:

- Row 2 End Time: 12:30 am
- Row 3 Start Time: 1:15 pm
- Row 5 End Time: 7:30 pm
- Row 6 Start Time: 7:30 pm
- Row 8 End Time: 7:00 am
- Row 9 Start Time: 1:45 am
- Row 11 End Time: 2:15 am
- Row 12 Start Time: 6:45 pm