Math worksheet for calculating elapsed time between given start and end times.

To find out how much time has elapsed between two times, we subtract the starting time from the ending time. We do this by subtracting hours and minutes separately. If the minutes in the ending time are less than the minutes in the starting time, we borrow 1 hour (which is 60 minutes) from the hours.

Let’s go through each problem one by one:

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1) 4:00 P.M. to 8:46 P.M.
Hours: 8 - 4 = 4 hours
Minutes: 46 - 0 = 46 minutes
→ 4 hours 46 minutes

2) 4:20 P.M. to 8:00 P.M.
We can’t subtract 20 from 0, so borrow 1 hour from 8 → becomes 7:60
Now: 7 - 4 = 3 hours, 60 - 20 = 40 minutes
→ 3 hours 40 minutes

3) 5:20 A.M. to 10:09 A.M.
Minutes: 09 - 20 → can’t do, borrow 1 hour from 10 → becomes 9:69
9 - 5 = 4 hours, 69 - 20 = 49 minutes
→ 4 hours 49 minutes

4) 8:40 P.M. to 10:02 P.M.
Minutes: 02 - 40 → borrow 1 hour from 10 → becomes 9:62
9 - 8 = 1 hour, 62 - 40 = 22 minutes
→ 1 hour 22 minutes

5) 6:40 A.M. to 8:51 A.M.
Hours: 8 - 6 = 2 hours
Minutes: 51 - 40 = 11 minutes
→ 2 hours 11 minutes

6) 1:00 P.M. to 2:31 P.M.
Hours: 2 - 1 = 1 hour
Minutes: 31 - 0 = 31 minutes
→ 1 hour 31 minutes

7) 1:00 A.M. to 5:21 A.M.
Hours: 5 - 1 = 4 hours
Minutes: 21 - 0 = 21 minutes
→ 4 hours 21 minutes

8) 2:40 A.M. to 6:21 A.M.
Minutes: 21 - 40 → borrow 1 hour from 6 → becomes 5:81
5 - 2 = 3 hours, 81 - 40 = 41 minutes
→ 3 hours 41 minutes

9) 12:20 P.M. to 4:44 P.M.
Hours: 4 - 12 → but since it’s same day, think of 12 as 0 for subtraction? Actually, better to count forward:
From 12:20 to 4:20 is 4 hours, then 4:20 to 4:44 is 24 minutes → total 4 hours 24 minutes
Or mathematically: 4:44 - 12:20 → treat 12 as 0? No — actually, 12:20 PM to 4:44 PM is just 4 hours and 24 minutes.
→ 4 hours 24 minutes

10) 5:00 A.M. to 6:19 A.M.
Hours: 6 - 5 = 1 hour
Minutes: 19 - 0 = 19 minutes
→ 1 hour 19 minutes

11) 8:40 A.M. to 10:19 A.M.
Minutes: 19 - 40 → borrow 1 hour from 10 → becomes 9:79
9 - 8 = 1 hour, 79 - 40 = 39 minutes
→ 1 hour 39 minutes

12) 5:20 A.M. to 9:00 A.M.
Minutes: 00 - 20 → borrow 1 hour from 9 → becomes 8:60
8 - 5 = 3 hours, 60 - 20 = 40 minutes
→ 3 hours 40 minutes

13) 6:00 P.M. to 8:56 P.M.
Hours: 8 - 6 = 2 hours
Minutes: 56 - 0 = 56 minutes
→ 2 hours 56 minutes

14) 6:20 A.M. to 9:42 A.M.
Hours: 9 - 6 = 3 hours
Minutes: 42 - 20 = 22 minutes
→ 3 hours 22 minutes

15) 2:40 P.M. to 5:20 P.M.
Minutes: 20 - 40 → borrow 1 hour from 5 → becomes 4:80
4 - 2 = 2 hours, 80 - 40 = 40 minutes
→ 2 hours 40 minutes

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Final Answer:
1) 4 hours 46 minutes
2) 3 hours 40 minutes
3) 4 hours 49 minutes
4) 1 hour 22 minutes
5) 2 hours 11 minutes
6) 1 hour 31 minutes
7) 4 hours 21 minutes
8) 3 hours 41 minutes
9) 4 hours 24 minutes
10) 1 hour 19 minutes
11) 1 hour 39 minutes
12) 3 hours 40 minutes
13) 2 hours 56 minutes
14) 3 hours 22 minutes
15) 2 hours 40 minutes