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28
45 − 17 = 28 cm.
Class 2 · English Medium · Cambridge · Mathematics
Length, mass and capacity
Choose a suitable unit and compare measurements.
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Original Kidemy foundation practice · Read the example, write your answers, then check. This starter is shared across class versions; it is not a complete board-specific lesson or course.
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Learn the idea
Length measures distance; mass tells how much matter an object has; capacity tells how much a container can hold. Use the same unit before comparing.
Worked example
A ribbon is 32 cm long. Cut off 8 cm: 32 − 8 = 24 cm remain.
- Centimetres are useful for a short ribbon. Kilograms are useful for a bag of rice.
- Litres describe the capacity of a bottle. The number alone does not tell the unit.
Your written practice
Show your working on paper. Check your answer, then choose Next.
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kg
Kilograms measure mass.
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5
2 + 3 = 5 litres.
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