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

12 questions · Seed 45 · 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 5:15 pm in 24-hour clock format.
17:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:15.
2. Write 7:35 pm in 24-hour clock format.
19:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:35.
3. Write 8:25 pm in 24-hour clock format.
20:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:25.
4. 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.
5. Write 10:25 pm in 24-hour clock format.
22:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:25.
6. 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.
7. Write 10:30 pm in 24-hour clock format.
22:30
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:30.
8. Write 10:20 pm in 24-hour clock format.
22:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:20.
9. Write 8:40 pm in 24-hour clock format.
20:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:40.
10. Write 5:40 pm in 24-hour clock format.
17:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:40.
11. 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.
12. Write 6:20 pm in 24-hour clock format.
18:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:20.

12 questions · Seed 45 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

12-hour & 24-hour clock

Take your time. Show your thinking.

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

12 questions · Seed 45 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. Write 5:15 pm in 24-hour clock format.
17:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:15.
2. Write 7:35 pm in 24-hour clock format.
19:35
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:35.
3. Write 8:25 pm in 24-hour clock format.
20:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:25.
4. 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.
5. Write 10:25 pm in 24-hour clock format.
22:25
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:25.
6. 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.
7. Write 10:30 pm in 24-hour clock format.
22:30
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:30.
8. Write 10:20 pm in 24-hour clock format.
22:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:20.
9. Write 8:40 pm in 24-hour clock format.
20:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:40.
10. Write 5:40 pm in 24-hour clock format.
17:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:40.
11. 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.
12. Write 6:20 pm in 24-hour clock format.
18:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:20.

12 questions · Seed 45 · Age guidance, not curriculum certification