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 10:20 pm in 24-hour clock format.
10 · 20 · 24 · 12-hour & 24-hour clock
2. Write 2:20 pm in 24-hour clock format.
2 · 20 · 24 · 12-hour & 24-hour clock
3. Write 7:50 pm in 24-hour clock format.
7 · 50 · 24 · 12-hour & 24-hour clock
4. Write 5:10 pm in 24-hour clock format.
5 · 10 · 24 · 12-hour & 24-hour clock
5. Write 9:30 pm in 24-hour clock format.
9 · 30 · 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 8:15 pm in 24-hour clock format.
8 · 15 · 24 · 12-hour & 24-hour clock
8. Write 10:15 pm in 24-hour clock format.
10 · 15 · 24 · 12-hour & 24-hour clock
9. Write 10:40 pm in 24-hour clock format.
10 · 40 · 24 · 12-hour & 24-hour clock
10. Write 4:45 pm in 24-hour clock format.
4 · 45 · 24 · 12-hour & 24-hour clock
11. Write 1:40 pm in 24-hour clock format.
1 · 40 · 24 · 12-hour & 24-hour clock
12. Write 4:50 pm in 24-hour clock format.
4 · 50 · 24 · 12-hour & 24-hour clock

12 questions · Seed 104743 · 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 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.
2. 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.
3. Write 7:50 pm in 24-hour clock format.
19:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:50.
4. Write 5:10 pm in 24-hour clock format.
17:10
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:10.
5. Write 9:30 pm in 24-hour clock format.
21:30
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:30.
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 8:15 pm in 24-hour clock format.
20:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:15.
8. Write 10:15 pm in 24-hour clock format.
22:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:15.
9. Write 10:40 pm in 24-hour clock format.
22:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:40.
10. 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.
11. Write 1:40 pm in 24-hour clock format.
13:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:40.
12. Write 4:50 pm in 24-hour clock format.
16:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:50.

12 questions · Seed 104743 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 10-12

12-hour & 24-hour clock

Take your time. Show your thinking.

1. Write 10:20 pm in 24-hour clock format.
10 · 20 · 24 · 12-hour & 24-hour clock
2. Write 2:20 pm in 24-hour clock format.
2 · 20 · 24 · 12-hour & 24-hour clock
3. Write 7:50 pm in 24-hour clock format.
7 · 50 · 24 · 12-hour & 24-hour clock
4. Write 5:10 pm in 24-hour clock format.
5 · 10 · 24 · 12-hour & 24-hour clock
5. Write 9:30 pm in 24-hour clock format.
9 · 30 · 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 8:15 pm in 24-hour clock format.
8 · 15 · 24 · 12-hour & 24-hour clock
8. Write 10:15 pm in 24-hour clock format.
10 · 15 · 24 · 12-hour & 24-hour clock
9. Write 10:40 pm in 24-hour clock format.
10 · 40 · 24 · 12-hour & 24-hour clock
10. Write 4:45 pm in 24-hour clock format.
4 · 45 · 24 · 12-hour & 24-hour clock
11. Write 1:40 pm in 24-hour clock format.
1 · 40 · 24 · 12-hour & 24-hour clock
12. Write 4:50 pm in 24-hour clock format.
4 · 50 · 24 · 12-hour & 24-hour clock

12 questions · Seed 104743 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 10-12

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. 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.
2. 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.
3. Write 7:50 pm in 24-hour clock format.
19:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:50.
4. Write 5:10 pm in 24-hour clock format.
17:10
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:10.
5. Write 9:30 pm in 24-hour clock format.
21:30
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:30.
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 8:15 pm in 24-hour clock format.
20:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:15.
8. Write 10:15 pm in 24-hour clock format.
22:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:15.
9. Write 10:40 pm in 24-hour clock format.
22:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:40.
10. 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.
11. Write 1:40 pm in 24-hour clock format.
13:40
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:40.
12. Write 4:50 pm in 24-hour clock format.
16:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 4 + 12 = 16, giving 16:50.

12 questions · Seed 104743 · Age guidance, not curriculum certification