Estimating & Measuring
Maths: KS3, topic 3.2.1
Estimating & Measuring
Learn how to choose suitable metric units and estimate length, mass and capacity.
Choosing units
- We use different units for different types of measurement
- Length measures how long, wide or tall something is
- Mass measures how heavy something is
- Capacity measures how much liquid a container can hold
- Choose a unit that fits what you are measuring
Estimating length
Length can be measured in millimetres, centimetres, metres or kilometres
Use smaller units for smaller lengths and bigger units for bigger lengths
Estimating mass
- Mass can be measured in grams or kilograms
- Use grams for lighter objects and kilograms for heavier objects
Estimating capacity
- Capacity can be measured in millilitres or litres
- Use millilitres for small amounts of liquid
- A cup could hold about millilitres
- Use litres for larger amounts of liquid
- A bottle could hold about litre