Time & moneyAges 10-12

12-hour & 24-hour clock

Convert afternoon and evening 12-hour times into standard 24-hour clock notation. Review suitability for your learners before teaching.

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Age band:Ages 10-12 Ages 13-15

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Worksheet StudioPractice pack · Ages 10-12

12-hour & 24-hour clock

Take your time. Show your thinking.

1. Write 3:40 pm in 24-hour clock format.
3 · 40 · 24 · 12-hour & 24-hour clock
2. Write 3:25 pm in 24-hour clock format.
3 · 25 · 24 · 12-hour & 24-hour clock
3. Write 11:35 pm in 24-hour clock format.
11 · 35 · 24 · 12-hour & 24-hour clock
4. Write 9:55 pm in 24-hour clock format.
9 · 55 · 24 · 12-hour & 24-hour clock
5. Write 2:20 pm in 24-hour clock format.
2 · 20 · 24 · 12-hour & 24-hour clock
6. Write 7:05 pm in 24-hour clock format.
7 · 05 · 24 · 12-hour & 24-hour clock
7. Write 3:35 pm in 24-hour clock format.
3 · 35 · 24 · 12-hour & 24-hour clock
8. Write 2:00 pm in 24-hour clock format.
2 · 00 · 24 · 12-hour & 24-hour clock
9. Write 8:00 pm in 24-hour clock format.
8 · 00 · 24 · 12-hour & 24-hour clock
10. Write 5:20 pm in 24-hour clock format.
5 · 20 · 24 · 12-hour & 24-hour clock
11. Write 6:40 pm in 24-hour clock format.
6 · 40 · 24 · 12-hour & 24-hour clock
12. Write 4:45 pm in 24-hour clock format.
4 · 45 · 24 · 12-hour & 24-hour clock

12 questions · Seed 104747 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 10-12

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. Write 3:40 pm in 24-hour clock format.
15:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:40.
2. Write 3:25 pm in 24-hour clock format.
15:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:25.
3. Write 11:35 pm in 24-hour clock format.
23:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 11 + 12 = 23, giving 23:35.
4. Write 9:55 pm in 24-hour clock format.
21:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:55.
5. Write 2:20 pm in 24-hour clock format.
14:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 2 + 12 = 14, giving 14:20.
6. Write 7:05 pm in 24-hour clock format.
19:05
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:05.
7. Write 3:35 pm in 24-hour clock format.
15:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:35.
8. Write 2:00 pm in 24-hour clock format.
14:00
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 2 + 12 = 14, giving 14:00.
9. Write 8:00 pm in 24-hour clock format.
20:00
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:00.
10. Write 5:20 pm in 24-hour clock format.
17:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:20.
11. Write 6:40 pm in 24-hour clock format.
18:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:40.
12. Write 4:45 pm in 24-hour clock format.
16:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:45.

12 questions · Seed 104747 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 10-12

12-hour & 24-hour clock

Take your time. Show your thinking.

1. Write 3:40 pm in 24-hour clock format.
3 · 40 · 24 · 12-hour & 24-hour clock
2. Write 3:25 pm in 24-hour clock format.
3 · 25 · 24 · 12-hour & 24-hour clock
3. Write 11:35 pm in 24-hour clock format.
11 · 35 · 24 · 12-hour & 24-hour clock
4. Write 9:55 pm in 24-hour clock format.
9 · 55 · 24 · 12-hour & 24-hour clock
5. Write 2:20 pm in 24-hour clock format.
2 · 20 · 24 · 12-hour & 24-hour clock
6. Write 7:05 pm in 24-hour clock format.
7 · 05 · 24 · 12-hour & 24-hour clock
7. Write 3:35 pm in 24-hour clock format.
3 · 35 · 24 · 12-hour & 24-hour clock
8. Write 2:00 pm in 24-hour clock format.
2 · 00 · 24 · 12-hour & 24-hour clock
9. Write 8:00 pm in 24-hour clock format.
8 · 00 · 24 · 12-hour & 24-hour clock
10. Write 5:20 pm in 24-hour clock format.
5 · 20 · 24 · 12-hour & 24-hour clock
11. Write 6:40 pm in 24-hour clock format.
6 · 40 · 24 · 12-hour & 24-hour clock
12. Write 4:45 pm in 24-hour clock format.
4 · 45 · 24 · 12-hour & 24-hour clock

12 questions · Seed 104747 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 10-12

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. Write 3:40 pm in 24-hour clock format.
15:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:40.
2. Write 3:25 pm in 24-hour clock format.
15:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:25.
3. Write 11:35 pm in 24-hour clock format.
23:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 11 + 12 = 23, giving 23:35.
4. Write 9:55 pm in 24-hour clock format.
21:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:55.
5. Write 2:20 pm in 24-hour clock format.
14:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 2 + 12 = 14, giving 14:20.
6. Write 7:05 pm in 24-hour clock format.
19:05
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:05.
7. Write 3:35 pm in 24-hour clock format.
15:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:35.
8. Write 2:00 pm in 24-hour clock format.
14:00
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 2 + 12 = 14, giving 14:00.
9. Write 8:00 pm in 24-hour clock format.
20:00
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:00.
10. Write 5:20 pm in 24-hour clock format.
17:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:20.
11. Write 6:40 pm in 24-hour clock format.
18:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:40.
12. Write 4:45 pm in 24-hour clock format.
16:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:45.

12 questions · Seed 104747 · Age guidance, not curriculum certification