12-hour Clock 24-hour Clock 12-hour Clock 24-hour Clock 1. 2:55 ... - Free Printable

Problem Overview:

The worksheet requires converting times between the 12-hour clock and the 24-hour clock formats. Here's a breakdown of the tasks:

1. Convert 12-hour clock times to 24-hour clock times.
2. Convert 24-hour clock times to 12-hour clock times.

Solution:

#### Part 1: Convert 12-hour clock times to 24-hour clock times

The rules for conversion are:
- For times in the a.m. period (12:00 a.m. to 11:59 a.m.), the 24-hour clock time is the same as the 12-hour clock time.
- For times in the p.m. period (12:00 p.m. to 11:59 p.m.), add 12 hours to the 12-hour clock time.

Let's solve each row:

1. 2:55 p.m.
- Add 12 hours: \(2 + 12 = 14\)
- Time in 24-hour format: 14:55

2. 8:30 a.m.
- No change needed since it's in the a.m. period.
- Time in 24-hour format: 08:30

3. 9:12 p.m.
- Add 12 hours: \(9 + 12 = 21\)
- Time in 24-hour format: 21:12

4. 12:15 a.m.
- In the 24-hour format, 12:15 a.m. is represented as 00:15.
- Time in 24-hour format: 00:15

5. 7:40 a.m.
- No change needed since it's in the a.m. period.
- Time in 24-hour format: 07:40

6. 6:25 p.m.
- Add 12 hours: \(6 + 12 = 18\)
- Time in 24-hour format: 18:25

7. 4:00 a.m.
- No change needed since it's in the a.m. period.
- Time in 24-hour format: 04:00

8. 11:50 p.m.
- Add 12 hours: \(11 + 12 = 23\)
- Time in 24-hour format: 23:50

9. 12:00 p.m.
- In the 24-hour format, 12:00 p.m. is represented as 12:00.
- Time in 24-hour format: 12:00

10. 7:20 a.m.
- No change needed since it's in the a.m. period.
- Time in 24-hour format: 07:20

11. 2:15 p.m.
- Add 12 hours: \(2 + 12 = 14\)
- Time in 24-hour format: 14:15

12. 1:50 p.m.
- Add 12 hours: \(1 + 12 = 13\)
- Time in 24-hour format: 13:50

#### Part 2: Convert 24-hour clock times to 12-hour clock times

The rules for conversion are:
- For times from 00:00 to 11:59, use the same hour but append "a.m." (except for 00:00, which becomes 12:00 a.m.).
- For times from 12:00 to 23:59, subtract 12 hours and append "p.m."

Let's solve each row:

1. 18:10
- Subtract 12 hours: \(18 - 12 = 6\)
- Time in 12-hour format: 6:10 p.m.

2. 08:45
- No change needed since it's in the a.m. period.
- Time in 12-hour format: 8:45 a.m.

3. 11:00
- No change needed since it's in the a.m. period.
- Time in 12-hour format: 11:00 a.m.

4. 17:26
- Subtract 12 hours: \(17 - 12 = 5\)
- Time in 12-hour format: 5:26 p.m.

5. 23:35
- Subtract 12 hours: \(23 - 12 = 11\)
- Time in 12-hour format: 11:35 p.m.

6. 03:30
- No change needed since it's in the a.m. period.
- Time in 12-hour format: 3:30 a.m.

7. 00:00
- In the 12-hour format, 00:00 is represented as 12:00 a.m.
- Time in 12-hour format: 12:00 a.m.

8. 06:10
- No change needed since it's in the a.m. period.
- Time in 12-hour format: 6:10 a.m.

9. 19:25
- Subtract 12 hours: \(19 - 12 = 7\)
- Time in 12-hour format: 7:25 p.m.

10. 13:55
- Subtract 12 hours: \(13 - 12 = 1\)
- Time in 12-hour format: 1:55 p.m.

11. 04:22
- No change needed since it's in the a.m. period.
- Time in 12-hour format: 4:22 a.m.

12. 19:40
- Subtract 12 hours: \(19 - 12 = 7\)
- Time in 12-hour format: 7:40 p.m.

Final Answer:

Here is the completed worksheet:

#### Part 1: Convert 12-hour clock times to 24-hour clock times
| 12-hour Clock | 24-hour Clock |
|---------------|---------------|
| 2:55 p.m. | 14:55 |
| 8:30 a.m. | 08:30 |
| 9:12 p.m. | 21:12 |
| 12:15 a.m. | 00:15 |
| 7:40 a.m. | 07:40 |
| 6:25 p.m. | 18:25 |
| 4:00 a.m. | 04:00 |
| 11:50 p.m. | 23:50 |
| 12:00 p.m. | 12:00 |
| 7:20 a.m. | 07:20 |
| 2:15 p.m. | 14:15 |
| 1:50 p.m. | 13:50 |

#### Part 2: Convert 24-hour clock times to 12-hour clock times
| 24-hour Clock | 12-hour Clock |
|---------------|---------------|
| 18:10 | 6:10 p.m. |
| 08:45 | 8:45 a.m. |
| 11:00 | 11:00 a.m. |
| 17:26 | 5:26 p.m. |
| 23:35 | 11:35 p.m. |
| 03:30 | 3:30 a.m. |
| 00:00 | 12:00 a.m. |
| 06:10 | 6:10 a.m. |
| 19:25 | 7:25 p.m. |
| 13:55 | 1:55 p.m. |
| 04:22 | 4:22 a.m. |
| 19:40 | 7:40 p.m. |

Final Answer Box:

\[
\boxed{
\begin{array}{|c|c|c|c|}
\hline
\text{12-hour Clock} & \text{24-hour Clock} & \text{12-hour Clock} & \text{24-hour Clock} \\
\hline
2:55 \text{ p.m.} & 14:55 & 4:00 \text{ a.m.} & 04:00 \\
8:30 \text{ a.m.} & 08:30 & 11:50 \text{ p.m.} & 23:50 \\
9:12 \text{ p.m.} & 21:12 & 12:00 \text{ p.m.} & 12:00 \\
12:15 \text{ a.m.} & 00:15 & 7:20 \text{ a.m.} & 07:20 \\
7:40 \text{ a.m.} & 07:40 & 2:15 \text{ p.m.} & 14:15 \\
6:25 \text{ p.m.} & 18:25 & 1:50 \text{ p.m.} & 13:50 \\
\hline
\end{array}
}
\]
\[
\boxed{
\begin{array}{|c|c|c|c|}
\hline
\text{24-hour Clock} & \text{12-hour Clock} & \text{24-hour Clock} & \text{12-hour Clock} \\
\hline
18:10 & 6:10 \text{ p.m.} & 00:00 & 12:00 \text{ a.m.} \\
08:45 & 8:45 \text{ a.m.} & 06:10 & 6:10 \text{ a.m.} \\
11:00 & 11:00 \text{ a.m.} & 19:25 & 7:25 \text{ p.m.} \\
17:26 & 5:26 \text{ p.m.} & 13:55 & 1:55 \text{ p.m.} \\
23:35 & 11:35 \text{ p.m.} & 04:22 & 4:22 \text{ a.m.} \\
03:30 & 3:30 \text{ a.m.} & 19:40 & 7:40 \text{ p.m.} \\
\hline
\end{array}
}
\]