New
New
Year 5
Convert from larger to smaller units of measure
I can apply known unit conversions to convert from larger to smaller units of measure.
New
New
Year 5
Convert from larger to smaller units of measure
I can apply known unit conversions to convert from larger to smaller units of measure.
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Lesson details
Key learning points
- 1 m = 1000 mm
- 1 kg = 1,000 g
- 1 l = 1,000 ml
- 1 km = 1,000 m
Keywords
Equivalent - When two or more things have the same value.
Convert - To change a value or expression from one form to another.
Common misconception
Some pupils may see the prefix 'milli' and think it is related to 'million'.
Part of the lesson focuses on the etymology of the words and the fact that the prefix 'milli' means 'thousandth'; a millimetre is a thousandth of a litre and a millilitre is one thousandth of a litre. Consider displaying this in your environment.
You may have had previous experience of converting between units multiplicatively - multiplying or dividing by 10, 100 or 1000. Here, a different approach is used, based around partitioning the number. Knowing the key unit conversions, and the multiples thereof, forms the basis.
Teacher tip
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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Starter quiz
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6 Questions
Q1.
How many metres are there in one kilometre?
10
100
10,000
Q2.
How many grams are there in one kilogram?
Q3.
How many millilitres are there in one litre?
Q4.
Which of these numbers will you say if you are counting in steps of one thousand from zero?
400
4,400
Q5.
If each of the circles is worth 1,000, what is the total value?
Q6.
What is the multiple of 1,000 after 9,000?
1,000
9,100
1,900
Exit quiz
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6 Questions
Q1.
Convert these kilograms to grams. Altogether, there are ___.
400 g
40 g
4, 400 g
Q2.
Convert these kilometres to metres.
500 m
50,000 m
5 m
Q3.
How many millimetres are there in 7 metres? mm
Q4.
What are the missing numbers on this number line?
10
200
100
Q5.
Add 1,000 g to the amount shown. g
Q6.
Izzy weighs her pet cat. The cat has a mass of 2 kg. She weighs her pet dog. The dog has a mass of 6 kg. What is their combined mass in grams? g