Understand approximate equivalence between metric and imperial units | Maths

Starter quiz

Match the unit of measure with the correct type of measure.
- centimetre
  
  ⇔
  
  length ✓
- gram
  
  ⇔
  
  mass ✓
- litre
  
  ⇔
  
  capacity ✓
Match the unit of measure with the correct type of measure.
- kilometre
  
  ⇔
  
  length ✓
- kilogram
  
  ⇔
  
  mass ✓
- millilitre
  
  ⇔
  
  capacity ✓
Match the unit of measure to the correct abbreviation.
- millimetre
  
  ⇔
  
  mm ✓
- metre
  
  ⇔
  
  m ✓
- litre
  
  ⇔
  
  l ✓
- kilogram
  
  ⇔
  
  kg ✓
Which of these numbers will you say if you are counting in steps of 12? Select all that apply.
- 36 ✓
- 50
- 60 ✓
- 72 ✓
36 + 36 =
- '72' ✓
Round 91.4 cm to the nearest metre. ______ m
- '1' ✓

Exit quiz

Select all of the imperial units of measure.
- kilograms
- miles ✓
- millimetres
- inches ✓
- stones ✓
Select all of the metric units of measure.
- grams ✓
- ounces
- metres ✓
- millimetres ✓
- inches
Match the symbols to their correct meaning
- =
  
  ⇔
  
  equal to ✓
- <
  
  ⇔
  
  less than ✓
- >
  
  ⇔
  
  greater than ✓
Join the imperial unit of measurement to the context that makes the most sense.
- a pint of
  
  ⇔
  
  water ✓
- a mile of
  
  ⇔
  
  road ✓
- an ounce of
  
  ⇔
  
  cooking flour ✓
- a yard of
  
  ⇔
  
  string ✓
1 ounce is approximately equal to 28 g. Convert 10 ounces to grams. 10 ounces is approximately ______ g
- '280' ✓
1 foot is approximately equal to 30 cm. Convert 5 feet to centimetres. 5 feet is approximately ______ cm
- '150' ✓

Worksheet

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Presentation

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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.

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.

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Imperial - Imperial is a system of measuring which originated in England which has been replaced by the metric system in most countries.