Convert 12-hour time to 24-hour time with this educational worksheet.

Let’s go through each time conversion step by step.

We are converting from 12-hour clock (with am/pm) to 24-hour clock.

Rules:
- For am times:
→ If it’s 12:00am, that becomes 00:00.
→ Otherwise, just keep the same numbers (no change).
Example: 6:15am = 06:15

- For pm times:
→ If it’s 12:00pm, that stays 12:00.
→ Otherwise, add 12 to the hour.
Example: 3:00pm = 3 + 12 = 15:00

Now let’s solve each one:

1. 9:25pm → 9 + 12 = 21 → 21:25
2. 6:15am → no change → 06:15
3. 2:55pm → 2 + 12 = 14 → 14:55
4. 10:00am → no change → 10:00
5. 7:30pm → 7 + 12 = 19 → 19:30
6. 4:00am → no change → 04:00
7. 3:30pm → 3 + 12 = 15 → 15:30
8. 8:15am → no change → 08:15
9. 3:00pm → 3 + 12 = 15 → 15:00
10. 2:30am → no change → 02:30

11. 1:00pm → 1 + 12 = 13 → 13:00
12. 8:40am → no change → 08:40
13. 12:00pm → stays 12 → 12:00
14. 11:00am → no change → 11:00
15. 7:15pm → 7 + 12 = 19 → 19:15
16. 9:40am → no change → 09:40
17. 1:45pm → 1 + 12 = 13 → 13:45
18. 2:50am → no change → 02:50
19. 10:35pm → 10 + 12 = 22 → 22:35
20. 5:00am → no change → 05:00

All answers checked and verified.

Final Answer:
1. 21:25
2. 06:15
3. 14:55
4. 10:00
5. 19:30
6. 04:00
7. 15:30
8. 08:15
9. 15:00
10. 02:30
11. 13:00
12. 08:40
13. 12:00
14. 11:00
15. 19:15
16. 09:40
17. 13:45
18. 02:50
19. 22:35
20. 05:00