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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🔹 Understanding the Formats

- 12-hour clock: Uses AM (before noon) and PM (after noon).
- Example: 2:30 p.m. → 2:30 PM
- 24-hour clock: Runs from 00:00 to 23:59.
- Example: 14:30 = 2:30 p.m.
- Time in words: Descriptions like "quarter past two" or "twenty minutes to seven".

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We’ll go row by row and fill in the blanks.

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✔ Row 1:

Time in words: Quarter past two in the afternoon
→ "Quarter past two" = 2:15
→ Afternoon → PM
→ So, 12-hour clock: 2:15 p.m.
→ 24-hour clock: 14:15

✔ Answer:
- 12-hour clock: 2:15 p.m.
- 24-hour clock: 14:15

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✔ Row 2:

24-hour clock: 19:00
→ 19:00 = 7:00 p.m. (since 19 – 12 = 7)
→ So, 12-hour clock: 7:00 p.m.
→ In words: "Seven o'clock in the evening"

✔ Answer:
- Time in words: Seven o'clock in the evening
- 12-hour clock: 7:00 p.m.

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✔ Row 3:

Time in words: Twenty two minutes to nine in the evening
→ "Twenty-two minutes to nine" = 9:00 – 22 min = 8:38
→ Evening → PM
→ So, 12-hour clock: 8:38 p.m.
→ 24-hour clock: 20:38

✔ Answer:
- 12-hour clock: 8:38 p.m.
- 24-hour clock: 20:38

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✔ Row 4:

12-hour clock: 4:20 p.m.
→ 4:20 p.m. = 16:20 in 24-hour format
→ In words: "Twenty minutes past four in the afternoon"

✔ Answer:
- Time in words: Twenty minutes past four in the afternoon
- 24-hour clock: 16:20

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✔ Row 5:

24-hour clock: 23:57
→ 23:57 = 11:57 p.m. (since 23 = 11 p.m.)
→ In words: "Three minutes to midnight" or "Fifty-seven minutes past eleven in the evening"

Better phrasing: "Three minutes to midnight" or "Eleven fifty-seven p.m."
But standard way: "Fifty-seven minutes past eleven in the evening"

✔ Answer:
- Time in words: Fifty-seven minutes past eleven in the evening
- 12-hour clock: 11:57 p.m.

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✔ Row 6:

Time in words: Thirteen minutes past five in the morning
→ 5:13 a.m.
→ 24-hour clock: 05:13

✔ Answer:
- 12-hour clock: 5:13 a.m.
- 24-hour clock: 05:13

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✔ Row 7:

12-hour clock: 1:35 a.m.
→ 24-hour clock: 01:35
→ In words: "Thirty-five minutes past one in the morning"

✔ Answer:
- Time in words: Thirty-five minutes past one in the morning
- 24-hour clock: 01:35

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✔ Row 8:

Time in words: Eleven minutes to eight in the evening
→ "Eight minus eleven minutes" = 7:49 p.m.
→ 24-hour clock: 19:49

✔ Answer:
- 12-hour clock: 7:49 p.m.
- 24-hour clock: 19:49

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✔ Row 9:

24-hour clock: 03:25
→ 3:25 a.m.
→ In words: "Twenty-five minutes past three in the morning"

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

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✔ Row 10:

24-hour clock: 11:15
→ 11:15 a.m.
→ In words: "Fifteen minutes past eleven in the morning"

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

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✔ Row 11:

Time in words: Twelve midnight
→ Midnight is 12:00 a.m.
→ 24-hour clock: 00:00

✔ Answer:
- 12-hour clock: 12:00 a.m.
- 24-hour clock: 00:00

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✔ Row 12:

12-hour clock: 12:00 p.m.
→ This is noon, not midnight
→ 24-hour clock: 12:00
→ In words: "Twelve noon"

✔ Answer:
- Time in words: Twelve noon
- 24-hour clock: 12:00

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✔ Row 13:

Time in words: Quarter to four in the afternoon
→ "Quarter to four" = 4:00 – 15 min = 3:45
→ Afternoon → PM
→ 12-hour clock: 3:45 p.m.
→ 24-hour clock: 15:45

✔ Answer:
- 12-hour clock: 3:45 p.m.
- 24-hour clock: 15:45

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✔ Row 14:

24-hour clock: 00:20
→ 12-hour clock: 12:20 a.m.
→ In words: "Twenty minutes past twelve in the morning" or "Twelve twenty a.m."

✔ Answer:
- Time in words: Twenty minutes past twelve in the morning
- 12-hour clock: 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 | Twenty minutes past four in the afternoon | 4:20 p.m. | 16:20 |
| 5 | Fifty-seven minutes past eleven in the evening | 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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🎯 Summary of Key Concepts:

- AM = before noon (midnight to 12:00 p.m.)
- PM = after noon (12:00 p.m. to midnight)
- 24-hour clock: 00:00 (midnight) to 23:59
- Converting to 24-hour:
- AM: Keep same hours (except 12:00 a.m. → 00:00)
- PM: Add 12 to hour (e.g., 4:20 p.m. → 16:20)

This worksheet helps build fluency in reading and writing time across different formats. Let me know if you'd like a printable version!