We can count 4 intervals of 5 minutes between the two times, so 4 x 5 = 20. The duration of time that has passed is 20 minutes. There are other ways we can break time down more quickly and ...

Pizza Boss: Ambrose, I want you to fill in the timetable because I want you to do this very quickly, the journey time, you fill in ... start and finish times and durations. They could explore ...