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 1:20 pm in 24-hour clock format.
1 · 20 · 24 · 12-hour & 24-hour clock
2. Write 1:50 pm in 24-hour clock format.
1 · 50 · 24 · 12-hour & 24-hour clock
3. Write 8:50 pm in 24-hour clock format.
8 · 50 · 24 · 12-hour & 24-hour clock
4. Write 1:40 pm in 24-hour clock format.
1 · 40 · 24 · 12-hour & 24-hour clock
5. Write 2:05 pm in 24-hour clock format.
2 · 05 · 24 · 12-hour & 24-hour clock
6. Write 10:15 pm in 24-hour clock format.
10 · 15 · 24 · 12-hour & 24-hour clock
7. Write 5:15 pm in 24-hour clock format.
5 · 15 · 24 · 12-hour & 24-hour clock
8. Write 9:20 pm in 24-hour clock format.
9 · 20 · 24 · 12-hour & 24-hour clock
9. Write 9:55 pm in 24-hour clock format.
9 · 55 · 24 · 12-hour & 24-hour clock
10. Write 6:20 pm in 24-hour clock format.
6 · 20 · 24 · 12-hour & 24-hour clock
11. Write 10:40 pm in 24-hour clock format.
10 · 40 · 24 · 12-hour & 24-hour clock
12. Write 8:30 pm in 24-hour clock format.
8 · 30 · 24 · 12-hour & 24-hour clock

12 questions · Seed 104738 · 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 1:20 pm in 24-hour clock format.
13:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:20.
2. Write 1:50 pm in 24-hour clock format.
13:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:50.
3. Write 8:50 pm in 24-hour clock format.
20:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:50.
4. 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.
5. Write 2:05 pm in 24-hour clock format.
14:05
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 2 + 12 = 14, giving 14:05.
6. 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.
7. 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.
8. Write 9:20 pm in 24-hour clock format.
21:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:20.
9. Write 9:55 pm in 24-hour clock format.
21:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:55.
10. 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.
11. 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.
12. Write 8:30 pm in 24-hour clock format.
20:30
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:30.

12 questions · Seed 104738 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 10-12

12-hour & 24-hour clock

Take your time. Show your thinking.

1. Write 1:20 pm in 24-hour clock format.
1 · 20 · 24 · 12-hour & 24-hour clock
2. Write 1:50 pm in 24-hour clock format.
1 · 50 · 24 · 12-hour & 24-hour clock
3. Write 8:50 pm in 24-hour clock format.
8 · 50 · 24 · 12-hour & 24-hour clock
4. Write 1:40 pm in 24-hour clock format.
1 · 40 · 24 · 12-hour & 24-hour clock
5. Write 2:05 pm in 24-hour clock format.
2 · 05 · 24 · 12-hour & 24-hour clock
6. Write 10:15 pm in 24-hour clock format.
10 · 15 · 24 · 12-hour & 24-hour clock
7. Write 5:15 pm in 24-hour clock format.
5 · 15 · 24 · 12-hour & 24-hour clock
8. Write 9:20 pm in 24-hour clock format.
9 · 20 · 24 · 12-hour & 24-hour clock
9. Write 9:55 pm in 24-hour clock format.
9 · 55 · 24 · 12-hour & 24-hour clock
10. Write 6:20 pm in 24-hour clock format.
6 · 20 · 24 · 12-hour & 24-hour clock
11. Write 10:40 pm in 24-hour clock format.
10 · 40 · 24 · 12-hour & 24-hour clock
12. Write 8:30 pm in 24-hour clock format.
8 · 30 · 24 · 12-hour & 24-hour clock

12 questions · Seed 104738 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 10-12

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. Write 1:20 pm in 24-hour clock format.
13:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:20.
2. Write 1:50 pm in 24-hour clock format.
13:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:50.
3. Write 8:50 pm in 24-hour clock format.
20:50
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:50.
4. 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.
5. Write 2:05 pm in 24-hour clock format.
14:05
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 2 + 12 = 14, giving 14:05.
6. 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.
7. 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.
8. Write 9:20 pm in 24-hour clock format.
21:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:20.
9. Write 9:55 pm in 24-hour clock format.
21:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 9 + 12 = 21, giving 21:55.
10. 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.
11. 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.
12. Write 8:30 pm in 24-hour clock format.
20:30
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 8 + 12 = 20, giving 20:30.

12 questions · Seed 104738 · Age guidance, not curriculum certification