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 2:50 pm in 24-hour clock format.
2 · 50 · 24 · 12-hour & 24-hour clock
2. Write 10:20 pm in 24-hour clock format.
10 · 20 · 24 · 12-hour & 24-hour clock
3. Write 3:05 pm in 24-hour clock format.
3 · 05 · 24 · 12-hour & 24-hour clock
4. Write 4:05 pm in 24-hour clock format.
4 · 05 · 24 · 12-hour & 24-hour clock
5. Write 11:50 pm in 24-hour clock format.
11 · 50 · 24 · 12-hour & 24-hour clock
6. Write 8:55 pm in 24-hour clock format.
8 · 55 · 24 · 12-hour & 24-hour clock
7. Write 2:55 pm in 24-hour clock format.
2 · 55 · 24 · 12-hour & 24-hour clock
8. Write 6:10 pm in 24-hour clock format.
6 · 10 · 24 · 12-hour & 24-hour clock
9. Write 8:35 pm in 24-hour clock format.
8 · 35 · 24 · 12-hour & 24-hour clock
10. Write 3:40 pm in 24-hour clock format.
3 · 40 · 24 · 12-hour & 24-hour clock
11. Write 4:40 pm in 24-hour clock format.
4 · 40 · 24 · 12-hour & 24-hour clock
12. Write 1:55 pm in 24-hour clock format.
1 · 55 · 24 · 12-hour & 24-hour clock

12 questions · Seed 48 · 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 2:50 pm in 24-hour clock format.
14:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 2 + 12 = 14, giving 14:50.
2. 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.
3. 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.
4. Write 4:05 pm in 24-hour clock format.
16:05
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:05.
5. Write 11:50 pm in 24-hour clock format.
23:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 11 + 12 = 23, giving 23:50.
6. Write 8:55 pm in 24-hour clock format.
20:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:55.
7. Write 2:55 pm in 24-hour clock format.
14:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 2 + 12 = 14, giving 14:55.
8. Write 6:10 pm in 24-hour clock format.
18:10
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:10.
9. 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.
10. 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.
11. Write 4:40 pm in 24-hour clock format.
16:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:40.
12. Write 1:55 pm in 24-hour clock format.
13:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:55.

12 questions · Seed 48 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 10-12

12-hour & 24-hour clock

Take your time. Show your thinking.

1. Write 2:50 pm in 24-hour clock format.
2 · 50 · 24 · 12-hour & 24-hour clock
2. Write 10:20 pm in 24-hour clock format.
10 · 20 · 24 · 12-hour & 24-hour clock
3. Write 3:05 pm in 24-hour clock format.
3 · 05 · 24 · 12-hour & 24-hour clock
4. Write 4:05 pm in 24-hour clock format.
4 · 05 · 24 · 12-hour & 24-hour clock
5. Write 11:50 pm in 24-hour clock format.
11 · 50 · 24 · 12-hour & 24-hour clock
6. Write 8:55 pm in 24-hour clock format.
8 · 55 · 24 · 12-hour & 24-hour clock
7. Write 2:55 pm in 24-hour clock format.
2 · 55 · 24 · 12-hour & 24-hour clock
8. Write 6:10 pm in 24-hour clock format.
6 · 10 · 24 · 12-hour & 24-hour clock
9. Write 8:35 pm in 24-hour clock format.
8 · 35 · 24 · 12-hour & 24-hour clock
10. Write 3:40 pm in 24-hour clock format.
3 · 40 · 24 · 12-hour & 24-hour clock
11. Write 4:40 pm in 24-hour clock format.
4 · 40 · 24 · 12-hour & 24-hour clock
12. Write 1:55 pm in 24-hour clock format.
1 · 55 · 24 · 12-hour & 24-hour clock

12 questions · Seed 48 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 10-12

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. Write 2:50 pm in 24-hour clock format.
14:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 2 + 12 = 14, giving 14:50.
2. 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.
3. 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.
4. Write 4:05 pm in 24-hour clock format.
16:05
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:05.
5. Write 11:50 pm in 24-hour clock format.
23:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 11 + 12 = 23, giving 23:50.
6. Write 8:55 pm in 24-hour clock format.
20:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:55.
7. Write 2:55 pm in 24-hour clock format.
14:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 2 + 12 = 14, giving 14:55.
8. Write 6:10 pm in 24-hour clock format.
18:10
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:10.
9. 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.
10. 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.
11. Write 4:40 pm in 24-hour clock format.
16:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:40.
12. Write 1:55 pm in 24-hour clock format.
13:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:55.

12 questions · Seed 48 · Age guidance, not curriculum certification