Elapsed Time Worksheets - Free Printable

To solve the problem of calculating the elapsed time between the given start and end times, we need to determine how many hours and minutes have passed from the start time to the end time for each pair. Let's go through each entry step by step.

General Approach:

1. Identify the start and end times.
2. Calculate the difference in hours and minutes.
3. If the minutes exceed 60, convert excess minutes into hours.

Detailed Solutions:

#### 1. 2:45 P.M. to 5:15 P.M.
- Start: 2:45 P.M.
- End: 5:15 P.M.
- Difference in hours: \( 5 - 2 = 3 \) hours.
- Difference in minutes: \( 15 - 45 = -30 \) minutes (which means 30 minutes less than an hour).
- Adjust: Since we have a negative minute value, we borrow 1 hour (60 minutes) from the 3 hours.
- Hours: \( 3 - 1 = 2 \) hours.
- Minutes: \( 60 - 30 = 30 \) minutes.
- Elapsed Time: 2 hours 30 minutes.

#### 2. 6:30 P.M. to 8:45 P.M.
- Start: 6:30 P.M.
- End: 8:45 P.M.
- Difference in hours: \( 8 - 6 = 2 \) hours.
- Difference in minutes: \( 45 - 30 = 15 \) minutes.
- Elapsed Time: 2 hours 15 minutes.

#### 3. 12:00 P.M. to 9:15 P.M.
- Start: 12:00 P.M.
- End: 9:15 P.M.
- Difference in hours: \( 9 - 0 = 9 \) hours.
- Difference in minutes: \( 15 - 0 = 15 \) minutes.
- Elapsed Time: 9 hours 15 minutes.

#### 4. 8:15 P.M. to 11:30 P.M.
- Start: 8:15 P.M.
- End: 11:30 P.M.
- Difference in hours: \( 11 - 8 = 3 \) hours.
- Difference in minutes: \( 30 - 15 = 15 \) minutes.
- Elapsed Time: 3 hours 15 minutes.

#### 5. 10:45 A.M. to 12:15 P.M.
- Start: 10:45 A.M.
- End: 12:15 P.M.
- Difference in hours: \( 12 - 10 = 2 \) hours.
- Difference in minutes: \( 15 - 45 = -30 \) minutes (which means 30 minutes less than an hour).
- Adjust: Borrow 1 hour (60 minutes) from the 2 hours.
- Hours: \( 2 - 1 = 1 \) hour.
- Minutes: \( 60 - 30 = 30 \) minutes.
- Elapsed Time: 1 hour 30 minutes.

#### 6. 8:30 A.M. to 3:15 P.M.
- Start: 8:30 A.M.
- End: 3:15 P.M.
- Convert 3:15 P.M. to a 24-hour format: 15:15.
- Difference in hours: \( 15 - 8 = 7 \) hours.
- Difference in minutes: \( 15 - 30 = -15 \) minutes (which means 15 minutes less than an hour).
- Adjust: Borrow 1 hour (60 minutes) from the 7 hours.
- Hours: \( 7 - 1 = 6 \) hours.
- Minutes: \( 60 - 15 = 45 \) minutes.
- Elapsed Time: 6 hours 45 minutes.

#### 7. 9:00 A.M. to 11:45 A.M.
- Start: 9:00 A.M.
- End: 11:45 A.M.
- Difference in hours: \( 11 - 9 = 2 \) hours.
- Difference in minutes: \( 45 - 0 = 45 \) minutes.
- Elapsed Time: 2 hours 45 minutes.

#### 8. 4:45 A.M. to 10:30 A.M.
- Start: 4:45 A.M.
- End: 10:30 A.M.
- Difference in hours: \( 10 - 4 = 6 \) hours.
- Difference in minutes: \( 30 - 45 = -15 \) minutes (which means 15 minutes less than an hour).
- Adjust: Borrow 1 hour (60 minutes) from the 6 hours.
- Hours: \( 6 - 1 = 5 \) hours.
- Minutes: \( 60 - 15 = 45 \) minutes.
- Elapsed Time: 5 hours 45 minutes.

#### 9. 6:30 A.M. to 9:15 A.M.
- Start: 6:30 A.M.
- End: 9:15 A.M.
- Difference in hours: \( 9 - 6 = 3 \) hours.
- Difference in minutes: \( 15 - 30 = -15 \) minutes (which means 15 minutes less than an hour).
- Adjust: Borrow 1 hour (60 minutes) from the 3 hours.
- Hours: \( 3 - 1 = 2 \) hours.
- Minutes: \( 60 - 15 = 45 \) minutes.
- Elapsed Time: 2 hours 45 minutes.

#### 10. 11:00 A.M. to 11:45 A.M.
- Start: 11:00 A.M.
- End: 11:45 A.M.
- Difference in hours: \( 11 - 11 = 0 \) hours.
- Difference in minutes: \( 45 - 0 = 45 \) minutes.
- Elapsed Time: 0 hours 45 minutes.

#### 11. 3:00 P.M. to 9:45 P.M.
- Start: 3:00 P.M.
- End: 9:45 P.M.
- Difference in hours: \( 9 - 3 = 6 \) hours.
- Difference in minutes: \( 45 - 0 = 45 \) minutes.
- Elapsed Time: 6 hours 45 minutes.

Final Answer:

\[
\boxed{
\begin{array}{|c|c|c|}
\hline
\text{Start} & \text{End} & \text{Elapsed Time} \\
\hline
2:45 \text{ P.M.} & 5:15 \text{ P.M.} & 2 \text{ hours } 30 \text{ minutes} \\
6:30 \text{ P.M.} & 8:45 \text{ P.M.} & 2 \text{ hours } 15 \text{ minutes} \\
12:00 \text{ P.M.} & 9:15 \text{ P.M.} & 9 \text{ hours } 15 \text{ minutes} \\
8:15 \text{ P.M.} & 11:30 \text{ P.M.} & 3 \text{ hours } 15 \text{ minutes} \\
10:45 \text{ A.M.} & 12:15 \text{ P.M.} & 1 \text{ hour } 30 \text{ minutes} \\
8:30 \text{ A.M.} & 3:15 \text{ P.M.} & 6 \text{ hours } 45 \text{ minutes} \\
9:00 \text{ A.M.} & 11:45 \text{ A.M.} & 2 \text{ hours } 45 \text{ minutes} \\
4:45 \text{ A.M.} & 10:30 \text{ A.M.} & 5 \text{ hours } 45 \text{ minutes} \\
6:30 \text{ A.M.} & 9:15 \text{ A.M.} & 2 \text{ hours } 45 \text{ minutes} \\
11:00 \text{ A.M.} & 11:45 \text{ A.M.} & 0 \text{ hours } 45 \text{ minutes} \\
3:00 \text{ P.M.} & 9:45 \text{ P.M.} & 6 \text{ hours } 45 \text{ minutes} \\
\hline
\end{array}
}
\]