Grade 4 Maths Resources (7.1 Time - 12-hour & 24-hour Clock ... - Free Printable

Let's solve the worksheet step by step. We need to fill in the missing parts of the table, converting between time in words, 12-hour clock, and 24-hour clock formats.

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🔹 Key Rules:

- 12-hour clock: Uses AM (midnight to noon) and PM (noon to midnight).
- 24-hour clock: Runs from 00:00 (midnight) to 23:59.
- Conversions:
- 12:00 a.m. = 00:00 (midnight)
- 12:00 p.m. = 12:00 (noon)
- For PM times: add 12 hours to convert to 24-hour format (except 12:00 p.m. → 12:00)
- For AM times: use same hour (except 12:00 a.m. → 00:00)

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Now, let’s go through each row:

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1. Quarter past two in the afternoon

- In words: Quarter past two in the afternoon
- 12-hour clock: 2:15 p.m.
- 24-hour clock: 14:15
✔ *Because 2 p.m. = 14:00, plus 15 minutes = 14:15*

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2. 19:00

- 24-hour clock: 19:00
- 12-hour clock: 7:00 p.m.
- Time in words: Seven o'clock in the evening
✔ *19:00 is 7 p.m.*

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3. Twenty-two minutes to nine in the evening

- In words: Twenty-two minutes to nine in the evening
- 12-hour clock: 8:38 p.m.
*(9:00 p.m. minus 22 minutes = 8:38 p.m.)*
- 24-hour clock: 20:38
✔ *8:38 p.m. = 20:38*

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4. 4:20 p.m.

- 12-hour clock: 4:20 p.m.
- 24-hour clock: 16:20
✔ *4 p.m. = 16:00, so 16:20*

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5. 23:57

- 24-hour clock: 23:57
- 12-hour clock: 11:57 p.m.
- Time in words: Fifty-seven minutes to midnight
✔ *23:57 is 11:57 p.m., or 3 minutes before midnight*

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6. Thirteen minutes past five in the morning

- In words: Thirteen minutes past five in the morning
- 12-hour clock: 5:13 a.m.
- 24-hour clock: 05:13
✔ *5:13 a.m. = 05:13*

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7. 1:35 a.m.

- 12-hour clock: 1:35 a.m.
- 24-hour clock: 01:35
- Time in words: Thirty-five minutes past one in the morning
✔ *1:35 a.m. = 01:35*

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8. Eleven minutes to eight in the evening

- In words: Eleven minutes to eight in the evening
- 12-hour clock: 7:49 p.m.
*(8:00 p.m. minus 11 minutes = 7:49 p.m.)*
- 24-hour clock: 19:49
✔ *7:49 p.m. = 19:49*

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9. 03:25

- 24-hour clock: 03:25
- 12-hour clock: 3:25 a.m.
- Time in words: Twenty-five minutes past three in the morning
✔ *03:25 = 3:25 a.m.*

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10. 11:15

- 12-hour clock: 11:15
- 24-hour clock: 11:15
- Time in words: Fifteen minutes past eleven in the morning
✔ *11:15 a.m. = 11:15*

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11. Twelve midnight

- In words: Twelve midnight
- 12-hour clock: 12:00 a.m.
- 24-hour clock: 00:00
✔ *Midnight = 00:00*

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12. 12:00 p.m.

- 12-hour clock: 12:00 p.m.
- 24-hour clock: 12:00
- Time in words: Twelve noon
✔ *Noon = 12:00 p.m. = 12:00*

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13. Quarter to four in the afternoon

- In words: Quarter to four in the afternoon
- 12-hour clock: 3:45 p.m.
*(Quarter to 4 = 15 minutes before 4:00 p.m. → 3:45 p.m.)*
- 24-hour clock: 15:45
✔ *3:45 p.m. = 15:45*

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14. 00:20

- 24-hour clock: 00:20
- 12-hour clock: 12:20 a.m.
- Time in words: Twenty minutes past twelve in the morning
✔ *00:20 = 12:20 a.m.*

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✔ Final Completed Table:

| # | Time in words | 12-hour clock | 24-hour clock |
|---|------------------|---------------|---------------|
| 1 | Quarter past two in the afternoon | 2:15 p.m. | 14:15 |
| 2 | Seven o'clock in the evening | 7:00 p.m. | 19:00 |
| 3 | Twenty-two minutes to nine in the evening | 8:38 p.m. | 20:38 |
| 4 | Four twenty p.m. | 4:20 p.m. | 16:20 |
| 5 | Fifty-seven minutes to midnight | 11:57 p.m. | 23:57 |
| 6 | Thirteen minutes past five in the morning | 5:13 a.m. | 05:13 |
| 7 | Thirty-five minutes past one in the morning | 1:35 a.m. | 01:35 |
| 8 | Eleven minutes to eight in the evening | 7:49 p.m. | 19:49 |
| 9 | Twenty-five minutes past three in the morning | 3:25 a.m. | 03:25 |
|10 | Fifteen minutes past eleven in the morning | 11:15 a.m. | 11:15 |
|11 | Twelve midnight | 12:00 a.m. | 00:00 |
|12 | Twelve noon | 12:00 p.m. | 12:00 |
|13 | Quarter to four in the afternoon | 3:45 p.m. | 15:45 |
|14 | Twenty minutes past twelve in the morning | 12:20 a.m. | 00:20 |

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