Worksheet for converting 12-hour clock times to 24-hour format.
A worksheet titled "Converting 24-Hour Clock Times Sheet 2" with exercises to match am/pm times to 24-hour times and fill in missing times in a table.
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Step-by-step solution for: 24 Hour Clock Conversion Worksheets
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Show Answer Key & Explanations
Step-by-step solution for: 24 Hour Clock Conversion Worksheets
Explanation:
Let's solve this step by step.
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Part 1: Match the am/pm times to the 24-hour times.
We need to convert 12-hour format (with am/pm) to 24-hour format.
- 10:20am → This is in the morning, so it stays the same: 10:20
- 9:20pm → This is in the evening. Add 12 hours: 9 + 12 = 21 → 21:20
- 11:20am → Morning, so it stays the same: 11:20
- 8:20pm → Evening. 8 + 12 = 20 → 20:20
Now the second row:
- 12:35am → This is early morning. 12:00am is 00:00, so 12:35am is 00:35
- 2:35pm → Afternoon. 2 + 12 = 14 → 14:35
- 1:35pm → Afternoon. 1 + 12 = 13 → 13:35
- 12:35pm → This is noon, so it becomes 12:35 (12:00pm is 12:00, so 12:35pm is 12:35)
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Part 2: Fill in the missing times in the table.
We need to convert between 12-hour and 24-hour time.
Left Table:
- 7:25am → Morning, so 24-hour is 07:25 (already given)
- 2:15pm → Afternoon → 2 + 12 = 14 → 14:15
- 14:30 → 24-hour → 14:30 is 2:30pm → 2:30pm
- 18:02 → 18:02 is 6:02pm → 6:02pm
- 12:30am → This is 12:30 in the early morning → 00:30
- 23:40 → 23:40 is 11:40pm → 11:40pm
- 12:28pm → This is 12:28 in the afternoon → 12:28pm (same as 24-hour 12:28)
Wait — 12:28pm is already in 12-hour format. The 24-hour time for 12:28pm is 12:28.
But 12:28pm is not 23:40. Let's check:
23:40 is 11:40pm. So the 12-hour time for 23:40 is 11:40pm.
So the table is:
| 12 hour | 24 hour |
|--------|--------|
| 7:25am | 07:25 |
| 2:15pm | 14:15 |
| | 14:30 | → 2:30pm
| | 18:02 | → 6:02pm
| 12:30am| 00:30 |
| | 23:40 | → 11:40pm
| 12:28pm| 12:28 |
Wait — the 24-hour time for 12:28pm is 12:28, not 23:40. The table has 23:40 in the 24-hour column, so the 12-hour time is 11:40pm.
So the correct entries:
- 14:30 → 2:30pm
- 18:02 → 6:02pm
- 23:40 → 11:40pm
- 12:30am → 00:30
- 12:28pm → 12:28
Now the right table:
- 3:20am → Morning → 03:20
- 6:05pm → 6 + 12 = 18 → 18:05
- 09:50 → 9:50am → 9:50am
- 9:42pm → 9 + 12 = 21 → 21:42
- 20:17 → 20:17 is 8:17pm → 8:17pm
- 15:24 → 15:24 is 3:24pm → 3:24pm
- 10:17pm → 10 + 12 = 22 → 22:17
---
Now let's compile the answers.
Part 1 Answers:
- 10:20am → 10:20
- 9:20pm → 21:20
- 11:20am → 11:20
- 8:20pm → 20:20
- 12:35am → 00:35
- 2:35pm → 14:35
- 1:35pm → 13:35
- 12:35pm → 12:35
Part 2 Answers:
Left Table:
- 2:15pm → 14:15
- 14:30 → 2:30pm
- 18:02 → 6:02pm
- 12:30am → 00:30
- 23:40 → 11:40pm
- 12:28pm → 12:28
Right Table:
- 3:20am → 03:20
- 6:05pm → 18:05
- 09:50 → 9:50am
- 9:42pm → 21:42
- 20:17 → 8:17pm
- 15:24 → 3:24pm
- 10:17pm → 22:17
Final Answer:
For Part 1:
- 10:20am → 10:20
- 9:20pm → 21:20
- 11:20am → 11:20
- 8:20pm → 20:20
- 12:35am → 00:35
- 2:35pm → 14:35
- 1:35pm → 13:35
- 12:35pm → 12:35
For Part 2:
Left Table:
- 2:15pm → 14:15
- 14:30 → 2:30pm
- 18:02 → 6:02pm
- 12:30am → 00:30
- 23:40 → 11:40pm
- 12:28pm → 12:28
Right Table:
- 3:20am → 03:20
- 6:05pm → 18:05
- 09:50 → 9:50am
- 9:42pm → 21:42
- 20:17 → 8:17pm
- 15:24 → 3:24pm
- 10:17pm → 22:17
Let's solve this step by step.
---
Part 1: Match the am/pm times to the 24-hour times.
We need to convert 12-hour format (with am/pm) to 24-hour format.
- 10:20am → This is in the morning, so it stays the same: 10:20
- 9:20pm → This is in the evening. Add 12 hours: 9 + 12 = 21 → 21:20
- 11:20am → Morning, so it stays the same: 11:20
- 8:20pm → Evening. 8 + 12 = 20 → 20:20
Now the second row:
- 12:35am → This is early morning. 12:00am is 00:00, so 12:35am is 00:35
- 2:35pm → Afternoon. 2 + 12 = 14 → 14:35
- 1:35pm → Afternoon. 1 + 12 = 13 → 13:35
- 12:35pm → This is noon, so it becomes 12:35 (12:00pm is 12:00, so 12:35pm is 12:35)
---
Part 2: Fill in the missing times in the table.
We need to convert between 12-hour and 24-hour time.
Left Table:
- 7:25am → Morning, so 24-hour is 07:25 (already given)
- 2:15pm → Afternoon → 2 + 12 = 14 → 14:15
- 14:30 → 24-hour → 14:30 is 2:30pm → 2:30pm
- 18:02 → 18:02 is 6:02pm → 6:02pm
- 12:30am → This is 12:30 in the early morning → 00:30
- 23:40 → 23:40 is 11:40pm → 11:40pm
- 12:28pm → This is 12:28 in the afternoon → 12:28pm (same as 24-hour 12:28)
Wait — 12:28pm is already in 12-hour format. The 24-hour time for 12:28pm is 12:28.
But 12:28pm is not 23:40. Let's check:
23:40 is 11:40pm. So the 12-hour time for 23:40 is 11:40pm.
So the table is:
| 12 hour | 24 hour |
|--------|--------|
| 7:25am | 07:25 |
| 2:15pm | 14:15 |
| | 14:30 | → 2:30pm
| | 18:02 | → 6:02pm
| 12:30am| 00:30 |
| | 23:40 | → 11:40pm
| 12:28pm| 12:28 |
Wait — the 24-hour time for 12:28pm is 12:28, not 23:40. The table has 23:40 in the 24-hour column, so the 12-hour time is 11:40pm.
So the correct entries:
- 14:30 → 2:30pm
- 18:02 → 6:02pm
- 23:40 → 11:40pm
- 12:30am → 00:30
- 12:28pm → 12:28
Now the right table:
- 3:20am → Morning → 03:20
- 6:05pm → 6 + 12 = 18 → 18:05
- 09:50 → 9:50am → 9:50am
- 9:42pm → 9 + 12 = 21 → 21:42
- 20:17 → 20:17 is 8:17pm → 8:17pm
- 15:24 → 15:24 is 3:24pm → 3:24pm
- 10:17pm → 10 + 12 = 22 → 22:17
---
Now let's compile the answers.
Part 1 Answers:
- 10:20am → 10:20
- 9:20pm → 21:20
- 11:20am → 11:20
- 8:20pm → 20:20
- 12:35am → 00:35
- 2:35pm → 14:35
- 1:35pm → 13:35
- 12:35pm → 12:35
Part 2 Answers:
Left Table:
- 2:15pm → 14:15
- 14:30 → 2:30pm
- 18:02 → 6:02pm
- 12:30am → 00:30
- 23:40 → 11:40pm
- 12:28pm → 12:28
Right Table:
- 3:20am → 03:20
- 6:05pm → 18:05
- 09:50 → 9:50am
- 9:42pm → 21:42
- 20:17 → 8:17pm
- 15:24 → 3:24pm
- 10:17pm → 22:17
Final Answer:
For Part 1:
- 10:20am → 10:20
- 9:20pm → 21:20
- 11:20am → 11:20
- 8:20pm → 20:20
- 12:35am → 00:35
- 2:35pm → 14:35
- 1:35pm → 13:35
- 12:35pm → 12:35
For Part 2:
Left Table:
- 2:15pm → 14:15
- 14:30 → 2:30pm
- 18:02 → 6:02pm
- 12:30am → 00:30
- 23:40 → 11:40pm
- 12:28pm → 12:28
Right Table:
- 3:20am → 03:20
- 6:05pm → 18:05
- 09:50 → 9:50am
- 9:42pm → 21:42
- 20:17 → 8:17pm
- 15:24 → 3:24pm
- 10:17pm → 22:17
Parent Tip: Review the logic above to help your child master the concept of time worksheet 24 hour.