Year 4 - Maths
Read the time on a 12 and 24 hour digital clock
Time: Convert between 12 and 24 hour clocks: analogue and digital
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Study Guides
This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will read, write and convert time between analogue and digital 12- and 24-hour clocks. They will solve problems involving converting from hours to minutes, minutes to seconds, years to months, weeks to days.
Lesson Summary
You will learn to read the time on a 12 and 24 hour digital clock.
Key Notes
- There are 24 hours in a day
- Times after midday keep counting on from 12
- On the 24 hour clock the hours start at 0 and end at 23
Vocabulary To Learn
- 24 hour clock: A way of expressing the time using the numbers 0-23 for the hours.
- am: The hours between midnight and midday.
- pm: The hours between midday and midnight.
Common Mistakes To Avoid
- Part of the lesson requires pupils to decide whether times are before midday, at midday or after midday. Pupils can find categorising 12:00 and 00:00 tricky.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
There are 24 hours in a day. Times after midday keep counting on from 12.
2. Use this key word in a maths sentence and explain it clearly. '24 hour clock'
A way of expressing the time using the numbers 0-23 for the hours. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Part of the lesson requires pupils to decide whether times are before midday, at midday or after midday. Pupils can find categorising 12:00 and 00:00 tricky. Correction: Explicit teaching points are made based around this in the slide deck. However, it is worth really focusing on these points as they come up and, when assessing the pupils during the Practice tasks, paying particular attention to those times.
More Lessons In This Unit
Browse all guides in the Year 4 Maths guide library.