# Compare and describe measurements involving mass and capacity

I can compare and describe measurements involving mass and capacity.

# Compare and describe measurements involving mass and capacity

I can compare and describe measurements involving mass and capacity.

## Slide deck

## Lesson details

### Key learning points

- A change in mass or capacity can be described multiplicatively.
- The sentence 'The __________ is ___ times the mass/capacity/volume of the __________' supports understanding.
- Comparisons of measure can be represented as multiplication equations.
- Division can be represented as multiplication by a unit fraction

### Common misconception

Children may say 'ten times heavier' which is imprecise. Children are more familiar with multiplication resulting in an increase and need to appreciate that it can also result in a decrease.

We say, 'ten times the original mass' because this is more precise, especially when the scale factor is fractional. When we multiply by a unit fraction, it is the same as dividing the whole by the number of equal parts in it, resulting in a decrease.

### Keywords

Times the mass/capacity/volume - Times the mass/capacity/volume is a phrase that is used to compare and describe. For example, one bear might be three times the mass of another bear - it is three times as heavy.

Mass - Mass is a measure of how much matter something contains. It is commonly measured by how much something weighs. Mass can be measured in kilograms and grams.

Capacity - Capacity is a measure of the maximum amount of liquid a container can hold when full. Capacity can be measured in millilitres and litres.

Volume - Volume is the amount of space that an object takes up. In this case, the specific amount of liquid in a container. Volume can be measured in millilitres and litres.

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Video

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## Worksheet

## Starter quiz

### 6 Questions

120 x $${1}\over{4}$$ -

120 ÷ 4

120 x $${1}\over{3}$$ -

120 ÷ 3

150 x $${1}\over{3}$$ -

150 ÷ 3

120 x $${1}\over{6}$$ -

120 ÷ 6