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Time

Time. Primary 4 Mathematics. Chapter Learning Outcomes. Telling time in seconds Understanding and using the 24-hour clock Solve word problems related to time. Time In Seconds. There are three hands on this clock. This is the hour hand. This is the minute hand.

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Time

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  1. Time Primary 4 Mathematics

  2. Chapter Learning Outcomes • Telling time in seconds • Understanding and using the 24-hour clock • Solve word problems related to time

  3. Time In Seconds There are three hands on this clock. This is the hour hand. This is the minute hand. This is the second hand.

  4. Time In Seconds Use a stopwatch to see what you can do in 1 second! I can recall that 1 hour = 60 minutes. Well, 1 minute = 60 seconds! We use s to stand for seconds.

  5. Time In Seconds after 30 s 3.00 p.m. 3.01 p.m. after 30 s

  6. The 24-hour Clock What is the time shown on the clock? Using 12-hour clock Using 24-hour clock 9.30 a.m. Nine thirty a.m. 09 30 Zero nine thirty hours

  7. The 24-hour Clock What is the time shown on the clock? Using 12-hour clock Using 24-hour clock 10.00 p.m. Ten p.m. 22 00 Twenty-two hundred hours

  8. The 24-hour Clock

  9. Example Fill in the blanks. 04 30 5.20 p.m. 15 15 2.05 a.m. 12 00 9.55 p.m. 12 40 5.05 a.m.

  10. Word Problems Arianne started reading the newspaper at 18 00. She finished reading at 19 20. How long did she take to read the newspaper? I can solve this using a time line. She took 1 h 20 min.

  11. Word Problems Justin finished cooking his lunch at 13 45. He took 2 h 10 min to cook. At what time did he start cooking his lunch? Count backwards on the time line. He started cooking at 11 35.

  12. Example Andy took a flight from Melbourne to Singapore which lasted 9 h 30 min. He stopped in transit for 2 h before taking a connecting flight to Penang for 1 h 15 min. If he landed at 08 30 on Tuesday, when did he leave Melbourne? He left Melbourne at 19 45 on Monday.

  13. Example Jermaine started watching a movie marathon at 19 30. He finished watching the movies at 02 45 the following day. How long was the movie marathon? 4 h 30 min + 2 h 45 min = 6 h 75 min = 7 h 15 min The movie marathon lasted 7 h 15 min.

  14. Reference - Textbooks

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