Printable worksheet for practicing elapsed time calculations with 15 problems involving various start and end times.

To solve the problem of determining how much time has elapsed between two given times, we need to calculate the difference in hours and minutes between the start and end times. Let's go through each question step by step.

General Approach:

1. Identify the start and end times.
2. Calculate the difference in hours.
3. Calculate the difference in minutes.
4. Combine the results to get the total elapsed time.

If the end time is earlier than the start time (e.g., crossing midnight), we need to adjust accordingly.

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Solutions:

#### 1) 4:00 P.M. to 8:46 P.M.
- Start: 4:00 P.M.
- End: 8:46 P.M.
- Difference in hours: \(8 - 4 = 4\) hours
- Difference in minutes: \(46 - 0 = 46\) minutes
- Total elapsed time: 4 hours 46 minutes

#### 2) 4:20 P.M. to 8:00 P.M.
- Start: 4:20 P.M.
- End: 8:00 P.M.
- Difference in hours: \(8 - 4 = 4\) hours
- Difference in minutes: Since 8:00 P.M. is exactly on the hour, we subtract 20 minutes from 60 minutes: \(60 - 20 = 40\) minutes
- Total elapsed time: 3 hours 40 minutes

#### 3) 5:20 A.M. to 10:09 A.M.
- Start: 5:20 A.M.
- End: 10:09 A.M.
- Difference in hours: \(10 - 5 = 5\) hours
- Difference in minutes: Since 10:09 A.M. is less than 60 minutes past the hour, we subtract 20 minutes from 9 minutes: \(60 - 20 + 9 = 49\) minutes
- Total elapsed time: 4 hours 49 minutes

#### 4) 8:40 P.M. to 10:02 P.M.
- Start: 8:40 P.M.
- End: 10:02 P.M.
- Difference in hours: \(10 - 8 = 2\) hours
- Difference in minutes: Since 10:02 P.M. is less than 60 minutes past the hour, we subtract 40 minutes from 2 minutes: \(60 - 40 + 2 = 22\) minutes
- Total elapsed time: 1 hour 22 minutes

#### 5) 6:40 A.M. to 8:51 A.M.
- Start: 6:40 A.M.
- End: 8:51 A.M.
- Difference in hours: \(8 - 6 = 2\) hours
- Difference in minutes: Since 8:51 A.M. is less than 60 minutes past the hour, we subtract 40 minutes from 51 minutes: \(51 - 40 = 11\) minutes
- Total elapsed time: 2 hours 11 minutes

#### 6) 1:00 P.M. to 2:31 P.M.
- Start: 1:00 P.M.
- End: 2:31 P.M.
- Difference in hours: \(2 - 1 = 1\) hour
- Difference in minutes: \(31 - 0 = 31\) minutes
- Total elapsed time: 1 hour 31 minutes

#### 7) 1:00 A.M. to 5:21 A.M.
- Start: 1:00 A.M.
- End: 5:21 A.M.
- Difference in hours: \(5 - 1 = 4\) hours
- Difference in minutes: \(21 - 0 = 21\) minutes
- Total elapsed time: 4 hours 21 minutes

#### 8) 2:40 A.M. to 6:21 A.M.
- Start: 2:40 A.M.
- End: 6:21 A.M.
- Difference in hours: \(6 - 2 = 4\) hours
- Difference in minutes: Since 6:21 A.M. is less than 60 minutes past the hour, we subtract 40 minutes from 21 minutes: \(60 - 40 + 21 = 41\) minutes
- Total elapsed time: 3 hours 41 minutes

#### 9) 12:20 P.M. to 4:44 P.M.
- Start: 12:20 P.M.
- End: 4:44 P.M.
- Difference in hours: \(4 - 0 = 4\) hours
- Difference in minutes: Since 4:44 P.M. is less than 60 minutes past the hour, we subtract 20 minutes from 44 minutes: \(44 - 20 = 24\) minutes
- Total elapsed time: 4 hours 24 minutes

#### 10) 5:00 A.M. to 6:19 A.M.
- Start: 5:00 A.M.
- End: 6:19 A.M.
- Difference in hours: \(6 - 5 = 1\) hour
- Difference in minutes: \(19 - 0 = 19\) minutes
- Total elapsed time: 1 hour 19 minutes

#### 11) 8:40 A.M. to 10:19 A.M.
- Start: 8:40 A.M.
- End: 10:19 A.M.
- Difference in hours: \(10 - 8 = 2\) hours
- Difference in minutes: Since 10:19 A.M. is less than 60 minutes past the hour, we subtract 40 minutes from 19 minutes: \(60 - 40 + 19 = 39\) minutes
- Total elapsed time: 1 hour 39 minutes

#### 12) 5:20 A.M. to 9:00 A.M.
- Start: 5:20 A.M.
- End: 9:00 A.M.
- Difference in hours: \(9 - 5 = 4\) hours
- Difference in minutes: \(0 - 20 = 40\) minutes (since 9:00 A.M. is exactly on the hour)
- Total elapsed time: 3 hours 40 minutes

#### 13) 6:00 P.M. to 8:56 P.M.
- Start: 6:00 P.M.
- End: 8:56 P.M.
- Difference in hours: \(8 - 6 = 2\) hours
- Difference in minutes: \(56 - 0 = 56\) minutes
- Total elapsed time: 2 hours 56 minutes

#### 14) 6:20 A.M. to 9:42 A.M.
- Start: 6:20 A.M.
- End: 9:42 A.M.
- Difference in hours: \(9 - 6 = 3\) hours
- Difference in minutes: Since 9:42 A.M. is less than 60 minutes past the hour, we subtract 20 minutes from 42 minutes: \(42 - 20 = 22\) minutes
- Total elapsed time: 3 hours 22 minutes

#### 15) 2:40 P.M. to 5:20 P.M.
- Start: 2:40 P.M.
- End: 5:20 P.M.
- Difference in hours: \(5 - 2 = 3\) hours
- Difference in minutes: \(20 - 40 = 40\) minutes (since 5:20 P.M. is exactly on the hour)
- Total elapsed time: 2 hours 40 minutes

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Final Answers:

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

\boxed{
\begin{array}{l}
1. \text{4 hours 46 minutes} \\
2. \text{3 hours 40 minutes} \\
3. \text{4 hours 49 minutes} \\
4. \text{1 hour 22 minutes} \\
5. \text{2 hours 11 minutes} \\
6. \text{1 hour 31 minutes} \\
7. \text{4 hours 21 minutes} \\
8. \text{3 hours 41 minutes} \\
9. \text{4 hours 24 minutes} \\
10. \text{1 hour 19 minutes} \\
11. \text{1 hour 39 minutes} \\
12. \text{3 hours 40 minutes} \\
13. \text{2 hours 56 minutes} \\
14. \text{3 hours 22 minutes} \\
15. \text{2 hours 40 minutes} \\
\end{array}
}