Year 5 - Maths
Compare and describe lengths using knowledge of division
Compare and describe measurements using knowledge of multiplication and division
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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 learn to compare and describe measurements using multiplication and division, applying their understanding of scaling as a structure of multiplication.
Lesson Summary
You will learn to compare and describe lengths using knowledge of division.
Key Notes
- Lengths can be compared using division.
- The stem sentence, 'The ___ is ___ times the length of the ___' can be used to compare and describe lengths.
- Comparisons of length can be represented as multiplication equations with a fractional multiplier.
Vocabulary To Learn
- Times the length/height/depth: Times the length/height/depth is a phrase that is used to compare and describe lengths or heights. For example, one tree might be three times the height of another tree; it is three times as tall.
- Unit fraction: A unit fraction is a fraction where the numerator is one.
Common Mistakes To Avoid
- Children are more familiar with multiplication resulting in an increase and so may not accept that it can also result in a decrease.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Lengths can be compared using division. The stem sentence, 'The ___ is ___ times the length of the ___' can be used to compare and describe lengths.
2. Use this key word in a maths sentence and explain it clearly. 'Times the length/height/depth'
Times the length/height/depth is a phrase that is used to compare and describe lengths or heights. For example, one tree might be three times the height of another tree; it is three times as tall. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Children are more familiar with multiplication resulting in an increase and so may not accept that it can also result in a decrease. Correction: When we multiply by a unit fraction, it is the same as dividing the whole by the denominator. This results in a decrease in length.
More Lessons In This Unit
- Compare and describe lengths using knowledge of multiplication Study Guide
- Compare and describe measurements involving mass and capacity Study Guide
- Compare and describe measurements involving time and money Study Guide
- Describe changes in measurement using knowledge of multiplication and division Study Guide
- Solve comparison and change problems in a range of contexts Study Guide
- Solve comparison and change problems using division Study Guide
- Solve comparison and change problems using multiplication Study Guide
- Solve problems involving comparison and change Study Guide
- Use knowledge of multiplication and division to solve comparison and change problems Study Guide
Browse all guides in the Year 5 Maths guide library.