Life skills · Grades 3–7
Timetables, durations and buffer time
A start time names a point in the day; duration measures how long an activity lasts.
Understand the idea
Separate clock time from duration
A start time names a point in the day; duration measures how long an activity lasts.
Count breaks correctly
A break between consecutive sessions does not occur after the final session unless stated.
Examples and reasoning
A lesson starts at 09:10 and ends at 09:55. How many minutes does it last?
45
45
An activity starts at 14:20 and lasts 35 minutes. Give the end time in 24-hour format.
14:55
14:55
Check your understanding
Three 20-minute tasks have two 5-minute breaks between them. Find total minutes.
A bus leaves at 08:45. You plan to arrive 10 minutes earlier. Give the arrival time in 24-hour format.
Convert 2 hours 15 minutes to minutes.
A 90-minute block contains 25 minutes of reading and 35 minutes of writing. How many minutes remain?
Answers and marking notes
Answers and marking notes
- 70
3 × 20 + 2 × 5 = 70
- 08:35
08:35
- 135
2 × 60 + 15 = 135
- 30
90 − 25 − 35 = 30
Learning preview · teacher review required. Grade bands are approximate, not official curriculum alignment.