New
New
Solve problems involving converting between units of time
You can solve problems involving converting between units of time
Lesson 9 of 10
New
New
- Year 5
Solve problems involving converting between units of time
You can solve problems involving converting between units of time
Lesson details
Key learning points
- There are 60 minutes in an hour.
- There are 24 hours in a day.
- There are 12 months in a year.
- There are 365 days in most years.
Keywords
Convert - To convert is to change a value or expression from one form to another, such as minutes to hours.
Common misconception
Some pupils might think 8:45 + 20 mins = 8:65. As our system of time is not based around the decimal system, this is incorrect.
Some pupils may still not be fully au fait with telling the time, though the lesson presumes they are. Providing them with a mini-clock with movable hands will help to reinforce the idea of bridging to and then from the o'clock time.
The lesson uses a number line as a way of supporting mental calculation when working out time differences. It presumes that pupils already have good fluency with number bonds to 60. The third cycle focusses on building timetables and the next lesson looks at interpreting timetables.
Teacher tip
Equipment
Licence
This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Match the numbers and phrases to make the statements correct.
Match the numbers and phrases to make the statements correct.
Q2.40 = 15 +
40 = 15 +
Q3.37 + = 60
37 + = 60
Q4.Match the calculation to the strategy.
Match the calculation to the strategy.
Q5.What time is being shown here?
What time is being shown here?
9 minutes past 2
15 minutes past 9
Q6.Match the time intervals.
Match the time intervals.
Assessment exit quiz
6 Questions
Q1.What time is 20 minutes after 3:55?
What time is 20 minutes after 3:55?
23:55
3:75
3:35
Q2.What time is 25 minutes before 3:10? 2:
What time is 25 minutes before 3:10? 2:
Q3.A TV show starts at quarter to 5 and ends at 5:25. How long is the programme? The programme lasts for minutes.
A TV show starts at quarter to 5 and ends at 5:25. How long is the programme? The programme lasts for minutes.
Q4.Choose the correct inequality symbol to describe the relationship between the units of time. 5 weeks 30 days
Choose the correct inequality symbol to describe the relationship between the units of time. 5 weeks 30 days
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Q5.Choose the correct inequality symbol to describe the relationship between the units of time. 3,000 days 10 years
Choose the correct inequality symbol to describe the relationship between the units of time. 3,000 days 10 years
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Q6.Choose the correct inequality symbol to describe the relationship between these time intervals. 60 months 5 years
Choose the correct inequality symbol to describe the relationship between these time intervals. 60 months 5 years
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