TIME INTERVALS

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TIME INTERVALS
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TIME INTERVALS

• When calculating a time interval it is
  sensible to do the following steps
• Count the number of minutes to the next
  oclock
• Count from that oclock until the end time
• Add the two parts together
• A time line can also be useful to show this.

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• Starter questions
• How many minutes from

10 min
1. 9.50 until 10 oclock?
2. 3.35 until 4 oclock?
25min
3. Quarter past 1 till 2 oclock?
45 min
How many hours and minutes from 4. 8 oclock
until 10.20?
2hr 20min
4hrs 45min
5. 1 oclock until 5.45 ?
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• Find the time from 2.30 pm until 4.10 pm?
• 2.30 pm ? 3.00 pm
• TOTAL 1hr 40 min

30 min
1 hour
10 min
2.30 3 oclock
4 oclock 4.10
30min
3.00 pm ? 4.10 pm 1hr 10 min
5

• Find the time from 5.15 am until 9.40am?
• 5.15 am ? 6.00 am 45 min
• 6.00 am ? 9.40 am 3hr 40 min
• TOTAL 3hr 85 min
• 4hr 25
  min

45 min
1 hr
1hr
1hr
40 min
5.15 6oclock 7oclock
8oclock 9oclock 9.40
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Time Intervals over Midnight

• A ferry leaves Harwich at 1820 and arrives in
  Rotterdam at 0710 the following morning. How
  long did the crossing take?
• 1820 ? 1900 40
  min
• 1900 ? midnight (2400) 5hrs
• Midnight (0000) ? 0710 7hrs 10 min
• TOTAL 12hr 50
  min

5 hrs
40 min
7hrs
10 min
1820 1900 . . . . . . . . . . Midnight.
. . . . . . . . . . . . 0700 0710
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TIMETABLES
Sam arrives at Edinburgh station at 4 oclock.
When is the next train to Larbert?
4 oclock 1600hrs
2pm1400hrs
What does each highlighted box tell us?
David needs to be in Stirling by 2pm. What is the
most suitable train from Edinburgh?
He should leave Edinburgh at 1230 and arrive in
Stirling at 1319