Year 3 - Maths
Solve problems involving length and height
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 solve problems about lengths and heights.
Key Notes
- Word problems can be represented in a bar model by identifying the parts and the whole.
- To find the whole, we need to add the parts together.
- To find a part, we need to subtract the part we know from the whole.
- If the units are different, they need to be converted to the same unit.
Vocabulary To Learn
- bar model: A pictorial representation of a problem where bars are used to represent the known and unknown quantities.
- part: Some but not all of something. It is an amount or section which, when combined with others, makes up the whole.
- whole: All of something. It is complete.
Common Mistakes To Avoid
- Converting between units; interpreting a word problem; confusing parts and wholes.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Word problems can be represented in a bar model by identifying the parts and the whole. To find the whole, we need to add the parts together.
2. Use this key word in a maths sentence and explain it clearly. 'bar model'
A pictorial representation of a problem where bars are used to represent the known and unknown quantities. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Converting between units; interpreting a word problem; confusing parts and wholes. Correction: When representing as a bar model, visualise the problem to help determine what the parts are and what the whole is.
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
- Estimate in metres and describe a metre in different ways 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
- Using graphs to represent lengths and heights Study Guide
Browse all guides in the Year 3 Maths guide library.