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 10:10 pm in 24-hour clock format.
10 · 10 · 24 · 12-hour & 24-hour clock
2. Write 2:00 pm in 24-hour clock format.
2 · 00 · 24 · 12-hour & 24-hour clock
3. Write 7:15 pm in 24-hour clock format.
7 · 15 · 24 · 12-hour & 24-hour clock
4. Write 4:20 pm in 24-hour clock format.
4 · 20 · 24 · 12-hour & 24-hour clock
5. Write 5:50 pm in 24-hour clock format.
5 · 50 · 24 · 12-hour & 24-hour clock
6. Write 10:00 pm in 24-hour clock format.
10 · 00 · 24 · 12-hour & 24-hour clock
7. Write 9:25 pm in 24-hour clock format.
9 · 25 · 24 · 12-hour & 24-hour clock
8. Write 8:10 pm in 24-hour clock format.
8 · 10 · 24 · 12-hour & 24-hour clock
9. Write 9:40 pm in 24-hour clock format.
9 · 40 · 24 · 12-hour & 24-hour clock
10. Write 5:30 pm in 24-hour clock format.
5 · 30 · 24 · 12-hour & 24-hour clock
11. Write 3:15 pm in 24-hour clock format.
3 · 15 · 24 · 12-hour & 24-hour clock
12. Write 8:35 pm in 24-hour clock format.
8 · 35 · 24 · 12-hour & 24-hour clock

12 questions · Seed 104732 · 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 10:10 pm in 24-hour clock format.
22:10
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:10.
2. 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.
3. Write 7:15 pm in 24-hour clock format.
19:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:15.
4. 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.
5. Write 5:50 pm in 24-hour clock format.
17:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:50.
6. Write 10:00 pm in 24-hour clock format.
22:00
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:00.
7. Write 9:25 pm in 24-hour clock format.
21:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:25.
8. Write 8:10 pm in 24-hour clock format.
20:10
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:10.
9. Write 9:40 pm in 24-hour clock format.
21:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:40.
10. Write 5:30 pm in 24-hour clock format.
17:30
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:30.
11. Write 3:15 pm in 24-hour clock format.
15:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:15.
12. Write 8:35 pm in 24-hour clock format.
20:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:35.

12 questions · Seed 104732 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

12-hour & 24-hour clock

Take your time. Show your thinking.

1. Write 10:10 pm in 24-hour clock format.
10 · 10 · 24 · 12-hour & 24-hour clock
2. Write 2:00 pm in 24-hour clock format.
2 · 00 · 24 · 12-hour & 24-hour clock
3. Write 7:15 pm in 24-hour clock format.
7 · 15 · 24 · 12-hour & 24-hour clock
4. Write 4:20 pm in 24-hour clock format.
4 · 20 · 24 · 12-hour & 24-hour clock
5. Write 5:50 pm in 24-hour clock format.
5 · 50 · 24 · 12-hour & 24-hour clock
6. Write 10:00 pm in 24-hour clock format.
10 · 00 · 24 · 12-hour & 24-hour clock
7. Write 9:25 pm in 24-hour clock format.
9 · 25 · 24 · 12-hour & 24-hour clock
8. Write 8:10 pm in 24-hour clock format.
8 · 10 · 24 · 12-hour & 24-hour clock
9. Write 9:40 pm in 24-hour clock format.
9 · 40 · 24 · 12-hour & 24-hour clock
10. Write 5:30 pm in 24-hour clock format.
5 · 30 · 24 · 12-hour & 24-hour clock
11. Write 3:15 pm in 24-hour clock format.
3 · 15 · 24 · 12-hour & 24-hour clock
12. Write 8:35 pm in 24-hour clock format.
8 · 35 · 24 · 12-hour & 24-hour clock

12 questions · Seed 104732 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. Write 10:10 pm in 24-hour clock format.
22:10
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:10.
2. 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.
3. Write 7:15 pm in 24-hour clock format.
19:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:15.
4. 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.
5. Write 5:50 pm in 24-hour clock format.
17:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:50.
6. Write 10:00 pm in 24-hour clock format.
22:00
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:00.
7. Write 9:25 pm in 24-hour clock format.
21:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:25.
8. Write 8:10 pm in 24-hour clock format.
20:10
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:10.
9. Write 9:40 pm in 24-hour clock format.
21:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:40.
10. Write 5:30 pm in 24-hour clock format.
17:30
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:30.
11. Write 3:15 pm in 24-hour clock format.
15:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:15.
12. Write 8:35 pm in 24-hour clock format.
20:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:35.

12 questions · Seed 104732 · Age guidance, not curriculum certification