New
New
Understand approximate equivalence between metric and imperial units
I can understand approximate equivalence between metric and imperial units.
Lesson 7 of 10
New
New
- Year 5
Understand approximate equivalence between metric and imperial units
I can understand approximate equivalence between metric and imperial units.
Lesson details
Key learning points
- 1 inch is approximately equal to 2.5cm.
- 1 pound (lb) is approximately 0.5kg.
- 1 pint is just greater than 0.4l.
Keywords
Metric - Metric is a system of measuring based mainly around the decimal system.
Imperial - Imperial is a system of measuring which originated in England which has been replaced by the metric system in most countries.
Common misconception
Two unrelated units of measure are called 'pounds' - the money version and the mass version. Pupils may confuse one for the other.
In this lesson, the word pounds (as in mass) is used with the abbreviation lb in brackets. It is recommended that you use both of these until pupils reach a point where they can automatically read lb as pounds and and record it as such.
Task 1 in the first cycle asks pupils to complete a table, adding in examples of imperial and metric units. It is recommended that they first do this as a group using a large sheet of sugar paper and sticky notes, to promote discussion.
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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Prior knowledge starter quiz
6 Questions
Q1.Match the unit of measure with the correct type of measure.
Match the unit of measure with the correct type of measure.
Q2.Match the unit of measure with the correct type of measure.
Match the unit of measure with the correct type of measure.
Q3.Match the unit of measure to the correct abbreviation.
Match the unit of measure to the correct abbreviation.
Q4.Which of these numbers will you say if you are counting in steps of 12? Select all that apply.
Which of these numbers will you say if you are counting in steps of 12? Select all that apply.
50
Q5.36 + 36 =
36 + 36 =
Q6.Round 91.4 cm to the nearest metre. m
Round 91.4 cm to the nearest metre. m
Assessment exit quiz
6 Questions
Q1.Select all of the imperial units of measure.
Select all of the imperial units of measure.
kilograms
millimetres
Q2.Select all of the metric units of measure.
Select all of the metric units of measure.
ounces
inches
Q3.Match the symbols to their correct meaning
Match the symbols to their correct meaning
Q4.Join the imperial unit of measurement to the context that makes the most sense.
Join the imperial unit of measurement to the context that makes the most sense.
Q5.1 ounce is approximately equal to 28 g. Convert 10 ounces to grams. 10 ounces is approximately g
1 ounce is approximately equal to 28 g. Convert 10 ounces to grams. 10 ounces is approximately g
Q6.1 foot is approximately equal to 30 cm. Convert 5 feet to centimetres. 5 feet is approximately cm
1 foot is approximately equal to 30 cm. Convert 5 feet to centimetres. 5 feet is approximately cm
