Time & moneyAges 13-15

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 13-15

12-hour & 24-hour clock

Take your time. Show your thinking.

1. Write 3:10 pm in 24-hour clock format.
3 · 10 · 24 · 12-hour & 24-hour clock
2. Write 11:40 pm in 24-hour clock format.
11 · 40 · 24 · 12-hour & 24-hour clock
3. Write 4:20 pm in 24-hour clock format.
4 · 20 · 24 · 12-hour & 24-hour clock
4. Write 3:05 pm in 24-hour clock format.
3 · 05 · 24 · 12-hour & 24-hour clock
5. Write 9:45 pm in 24-hour clock format.
9 · 45 · 24 · 12-hour & 24-hour clock
6. Write 5:45 pm in 24-hour clock format.
5 · 45 · 24 · 12-hour & 24-hour clock
7. Write 6:00 pm in 24-hour clock format.
6 · 00 · 24 · 12-hour & 24-hour clock
8. Write 8:45 pm in 24-hour clock format.
8 · 45 · 24 · 12-hour & 24-hour clock
9. Write 1:30 pm in 24-hour clock format.
1 · 30 · 24 · 12-hour & 24-hour clock
10. Write 6:05 pm in 24-hour clock format.
6 · 05 · 24 · 12-hour & 24-hour clock
11. Write 1:35 pm in 24-hour clock format.
1 · 35 · 24 · 12-hour & 24-hour clock
12. Write 1:45 pm in 24-hour clock format.
1 · 45 · 24 · 12-hour & 24-hour clock

12 questions · Seed 50 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 13-15

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. Write 3:10 pm in 24-hour clock format.
15:10
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:10.
2. Write 11:40 pm in 24-hour clock format.
23:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 11 + 12 = 23, giving 23:40.
3. Write 4:20 pm in 24-hour clock format.
16:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:20.
4. Write 3:05 pm in 24-hour clock format.
15:05
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:05.
5. Write 9:45 pm in 24-hour clock format.
21:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:45.
6. Write 5:45 pm in 24-hour clock format.
17:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:45.
7. Write 6:00 pm in 24-hour clock format.
18:00
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:00.
8. Write 8:45 pm in 24-hour clock format.
20:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:45.
9. Write 1:30 pm in 24-hour clock format.
13:30
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:30.
10. Write 6:05 pm in 24-hour clock format.
18:05
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:05.
11. Write 1:35 pm in 24-hour clock format.
13:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:35.
12. Write 1:45 pm in 24-hour clock format.
13:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:45.

12 questions · Seed 50 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

12-hour & 24-hour clock

Take your time. Show your thinking.

1. Write 3:10 pm in 24-hour clock format.
3 · 10 · 24 · 12-hour & 24-hour clock
2. Write 11:40 pm in 24-hour clock format.
11 · 40 · 24 · 12-hour & 24-hour clock
3. Write 4:20 pm in 24-hour clock format.
4 · 20 · 24 · 12-hour & 24-hour clock
4. Write 3:05 pm in 24-hour clock format.
3 · 05 · 24 · 12-hour & 24-hour clock
5. Write 9:45 pm in 24-hour clock format.
9 · 45 · 24 · 12-hour & 24-hour clock
6. Write 5:45 pm in 24-hour clock format.
5 · 45 · 24 · 12-hour & 24-hour clock
7. Write 6:00 pm in 24-hour clock format.
6 · 00 · 24 · 12-hour & 24-hour clock
8. Write 8:45 pm in 24-hour clock format.
8 · 45 · 24 · 12-hour & 24-hour clock
9. Write 1:30 pm in 24-hour clock format.
1 · 30 · 24 · 12-hour & 24-hour clock
10. Write 6:05 pm in 24-hour clock format.
6 · 05 · 24 · 12-hour & 24-hour clock
11. Write 1:35 pm in 24-hour clock format.
1 · 35 · 24 · 12-hour & 24-hour clock
12. Write 1:45 pm in 24-hour clock format.
1 · 45 · 24 · 12-hour & 24-hour clock

12 questions · Seed 50 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. Write 3:10 pm in 24-hour clock format.
15:10
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:10.
2. Write 11:40 pm in 24-hour clock format.
23:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 11 + 12 = 23, giving 23:40.
3. Write 4:20 pm in 24-hour clock format.
16:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:20.
4. Write 3:05 pm in 24-hour clock format.
15:05
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:05.
5. Write 9:45 pm in 24-hour clock format.
21:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:45.
6. Write 5:45 pm in 24-hour clock format.
17:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:45.
7. Write 6:00 pm in 24-hour clock format.
18:00
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:00.
8. Write 8:45 pm in 24-hour clock format.
20:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:45.
9. Write 1:30 pm in 24-hour clock format.
13:30
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:30.
10. Write 6:05 pm in 24-hour clock format.
18:05
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:05.
11. Write 1:35 pm in 24-hour clock format.
13:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:35.
12. Write 1:45 pm in 24-hour clock format.
13:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:45.

12 questions · Seed 50 · Age guidance, not curriculum certification