PowerPoint Presentation

[Audio] Before we begin, let's first start by reading the 24-hour clock..

[Audio] In one day, the hour hand goes around the clock 2 times and one round takes 12 hours

[Audio] For example, 8am refers to 8 o'clock in the morning and in the morning at 8 o'clock, the clock has turned 8 rounds, hence it is also read as 0800 hours. And at 9am, the clock has turned 9 rounds, hence it is read as 0900 hours..

[Audio] 8pm refers to 8 o'clock at night and at night at 8 o'clock, the hour hand has turned 20 rounds, hence it is also read as 20 00 hours. And at 9pm, the hour hand has turned 21 rounds, hence it is read as 21 00 hours..

[Audio] Let's now go through some questions in the assessment book.

[Audio] Terence spent 50 minutes folding paper aeroplanes. If he finished folding the paper aeroplanes at 14 10, at what time did he start to fold the paper aeroplanes? To make things easier, we start by counting back to the nearest hour, which in this case, is 14 00 hours. Counting back 10 minutes from 14 10 hours is 14 00 hours. Since 1 hour is 60 minutes, if we count 1 minute back from 14 00 hours, it will be 13 59 hours Hence, counting back another 40 minutes from 14 00 hours will be 13 20 hours..

[Audio] A movie at a theatre started at 13 55. If the movie lasted 2 h 15 min, at what time did it end? Let's start by counting hour by hour. One hour from 13 55 hours will be 14 55 hours. One hour from 14 55 hours will be 15 55 hours. The closest hour to 15 55 hours is 16 00 hours and counting from 15 55 hours to 16 00 hours is 5 minutes. Another 10 minutes from 16 00 hours will be 16 10 hours. To check, ensure that all the timings on the timeline is equal to 2 hour 15 minutes..