Converting units of length
I can use knowledge of multiplication and division to convert units of length.
Converting units of length
I can use knowledge of multiplication and division to convert units of length.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- There are 10 mm in 1 cm.
- There are 100 cm in 1 m.
- There are 1,000 m in 1 km.
- There are 1,000 mm in 1 m.
- There are 10 dm in 1 m.
Keywords
Convert - To convert means to change a value or expression from one form to another. In this context it means to change from one unit of measurement to another such as from cm to mm.
Decimetre - A decimetre is a metric unit of length, equal to one-tenth of a metre. Decimetre can be abbreviated to dm.
Common misconception
Children may confuse when to multiply or when to divide.
Encourage children to think about which unit of measure is larger e.g. km are larger than m. In a given amount, there will be fewer of the larger unit so we need to divide.
To help you plan your year 5 maths lesson on: Converting units of length, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 5 maths lesson on: Converting units of length, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 2 maths lessons from the Calculating with decimal fractions unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Lesson video
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Starter quiz
6 Questions
400
40
4
60
600
0
3.1
310
57.6
576
2.3
23
Exit quiz
6 Questions
103 mm
130 mm
1,300 mm
1.3 m
10.3 m
25 dm
2.5 m
250 dm
2,500 cm
2,500 mm