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 11:15 pm in 24-hour clock format.
11 · 15 · 24 · 12-hour & 24-hour clock
2. Write 5:45 pm in 24-hour clock format.
5 · 45 · 24 · 12-hour & 24-hour clock
3. Write 5:05 pm in 24-hour clock format.
5 · 05 · 24 · 12-hour & 24-hour clock
4. Write 3:20 pm in 24-hour clock format.
3 · 20 · 24 · 12-hour & 24-hour clock
5. Write 6:15 pm in 24-hour clock format.
6 · 15 · 24 · 12-hour & 24-hour clock
6. Write 11:50 pm in 24-hour clock format.
11 · 50 · 24 · 12-hour & 24-hour clock
7. Write 10:00 pm in 24-hour clock format.
10 · 00 · 24 · 12-hour & 24-hour clock
8. Write 3:05 pm in 24-hour clock format.
3 · 05 · 24 · 12-hour & 24-hour clock
9. Write 1:00 pm in 24-hour clock format.
1 · 00 · 24 · 12-hour & 24-hour clock
10. Write 10:55 pm in 24-hour clock format.
10 · 55 · 24 · 12-hour & 24-hour clock
11. Write 7:30 pm in 24-hour clock format.
7 · 30 · 24 · 12-hour & 24-hour clock
12. Write 6:40 pm in 24-hour clock format.
6 · 40 · 24 · 12-hour & 24-hour clock

12 questions · Seed 42 · 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 11:15 pm in 24-hour clock format.
23:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 11 + 12 = 23, giving 23:15.
2. Write 5:45 pm in 24-hour clock format.
17:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:45.
3. Write 5:05 pm in 24-hour clock format.
17:05
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:05.
4. Write 3:20 pm in 24-hour clock format.
15:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:20.
5. Write 6:15 pm in 24-hour clock format.
18:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:15.
6. 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.
7. 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.
8. 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.
9. Write 1:00 pm in 24-hour clock format.
13:00
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:00.
10. Write 10:55 pm in 24-hour clock format.
22:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:55.
11. Write 7:30 pm in 24-hour clock format.
19:30
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:30.
12. 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.

12 questions · Seed 42 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 10-12

12-hour & 24-hour clock

Take your time. Show your thinking.

1. Write 11:15 pm in 24-hour clock format.
11 · 15 · 24 · 12-hour & 24-hour clock
2. Write 5:45 pm in 24-hour clock format.
5 · 45 · 24 · 12-hour & 24-hour clock
3. Write 5:05 pm in 24-hour clock format.
5 · 05 · 24 · 12-hour & 24-hour clock
4. Write 3:20 pm in 24-hour clock format.
3 · 20 · 24 · 12-hour & 24-hour clock
5. Write 6:15 pm in 24-hour clock format.
6 · 15 · 24 · 12-hour & 24-hour clock
6. Write 11:50 pm in 24-hour clock format.
11 · 50 · 24 · 12-hour & 24-hour clock
7. Write 10:00 pm in 24-hour clock format.
10 · 00 · 24 · 12-hour & 24-hour clock
8. Write 3:05 pm in 24-hour clock format.
3 · 05 · 24 · 12-hour & 24-hour clock
9. Write 1:00 pm in 24-hour clock format.
1 · 00 · 24 · 12-hour & 24-hour clock
10. Write 10:55 pm in 24-hour clock format.
10 · 55 · 24 · 12-hour & 24-hour clock
11. Write 7:30 pm in 24-hour clock format.
7 · 30 · 24 · 12-hour & 24-hour clock
12. Write 6:40 pm in 24-hour clock format.
6 · 40 · 24 · 12-hour & 24-hour clock

12 questions · Seed 42 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 10-12

12-hour & 24-hour clock

Answers and reasoning. Review before teaching.

1. Write 11:15 pm in 24-hour clock format.
23:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 11 + 12 = 23, giving 23:15.
2. Write 5:45 pm in 24-hour clock format.
17:45
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:45.
3. Write 5:05 pm in 24-hour clock format.
17:05
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 5 + 12 = 17, giving 17:05.
4. Write 3:20 pm in 24-hour clock format.
15:20
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 3 + 12 = 15, giving 15:20.
5. Write 6:15 pm in 24-hour clock format.
18:15
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 6 + 12 = 18, giving 18:15.
6. 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.
7. 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.
8. 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.
9. Write 1:00 pm in 24-hour clock format.
13:00
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 1 + 12 = 13, giving 13:00.
10. Write 10:55 pm in 24-hour clock format.
22:55
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 10 + 12 = 22, giving 22:55.
11. Write 7:30 pm in 24-hour clock format.
19:30
For afternoon and evening pm times from 1:00 pm to 11:59 pm, add 12 to the hour: 7 + 12 = 19, giving 19:30.
12. 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.

12 questions · Seed 42 · Age guidance, not curriculum certification