1. Times / Time Intervals Timetables TIMESThere are two ways of giving the time. (i) 12-hour time which uses am, pm, noon & midnight. Each day begins at midnight. Mid-day is 12noon. Times from midnight to noon are am(morning). Times from noon to midnight are pm (afternoon/evening). Midnight and noon cannot have am or pm after them. (i) 24-hour time which uses 4 digits but neither am nor pm. Each day begins at 0000. The hours in the afternoon are 13, 14, 15, …. 24-hour clock times are used for timetables, videos, etc

2. In words12-hour clock24-hour clock Quarter to eight in morning. Half-past nine at night. mid-day. Five past midnight Twenty past six in the morning. Twenty-five to five in afternoon. 7.45am0745 9.30pm2130 12 noon1200 12.05am0005 6.20am0620 4.35pm1635

3. Time Intervals This is best done using “time lines”. Ex10900 until 1350 09001350 = 4 hrs 50 mins 4 hrs 50 mins Ex2 2.25pm until 8.40pm 2.25pm8.25pm8.40pm 6 hrs15 mins = 6 hrs 15 mins

4. Ex31745 until 2310 = 1745 18002310 15 mins 5 hrs 10 mins 5 hrs 25 mins Ex411.35pm until 6.20am = 11.35pmmidnight 6.20am 25 mins6 hrs 20 mins 6 hrs 45 mins