How long it takes

What this chapter teaches

To find how long something takes, jump to the next hour and then count on. An hour has 60 minutes, not 100, so times cannot be taken away like ordinary numbers. A minute is 60 seconds and a week is 7 days.

Three questions to ask

There is no one right wording. Listen for the idea.

1. A bus leaves at 09:40 and arrives at 11:15. How would you work out the journey?
2. Why can you not just take 940 away from 1115?
3. How many days are in 3 weeks, and how do you know?

After the chapter, the learner can

• Use clock faces to find how long from 09:40 to 11:15
• Change hours to minutes and minutes to seconds
• Count days and weeks on a calendar