Year 3 - Maths
Estimate in metres and describe a metre in different ways
Measuring length and recording in tables
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will continue to measure using appropriate tools and units progressing to using a wider range of measures, including comparing and using mixed units.
Lesson Summary
You will learn to estimate lengths and heights in metres and describe a metre in different ways.
Key Notes
- The length or height of an object can be estimated using the standardised unit of metres.
- One hundred, 1 cm lengths are the same as 1 m.
- Ten, 10 cm lengths are the same as 100 cm, which is the same as 1 m.
Vocabulary To Learn
- Estimate: An estimate is a given value, number or quantity that is near to the true amount.
- Metre: A metre is a standardised unit of measurement. We can abbreviate metre to m.
- Centimetre: A centimetre is a standardised unit of measurement. We can abbreviate centimetre to cm.
Common Mistakes To Avoid
- 100 cm is bigger than 1 m.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
The length or height of an object can be estimated using the standardised unit of metres. One hundred, 1 cm lengths are the same as 1 m.
2. Use this key word in a maths sentence and explain it clearly. 'Estimate'
An estimate is a given value, number or quantity that is near to the true amount. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: 100 cm is bigger than 1 m. Correction: 1 m is equal in length or height to 100 cm. 100 cm make up 1 m. They are the same length or height.
More Lessons In This Unit
- Converting between centimetres and millimetres Study Guide
- Converting between metres and centimetres Study Guide
- Estimate and measure lengths and heights and record in a table Study Guide
- Measure length and height from zero using whole m or cm Study Guide
- Measuring length and height using cm and mm Study Guide
- Millimetres as a unit of measure and the relationship between them and cm Study Guide
- Solve problems involving length Study Guide
- Solve problems involving length and height Study Guide
- Using graphs to represent lengths and heights Study Guide
Browse all guides in the Year 3 Maths guide library.