Year 3 - Maths
Compare non-unit fractions with the same denominator
Non-unit fractions
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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 explain that non-unit fractions are composed of more than one unit fraction using knowledge of unit fractions to find one whole.
Lesson Summary
You will learn to compare non-unit fractions with the same denominator.
Key Notes
- To compare non-unit fractions, the whole must be the same for each fraction.
- When you compare fractions with the same denominator, the greater the numerator the greater the fraction .
- If the whole is not the same, you can not compare the fractions.
Vocabulary To Learn
- Denominator: A denominator is the bottom number written in a fraction.
- Numerator: A numerator is the top number written in a fraction.
Common Mistakes To Avoid
- Pupils may try to compare fractions where the wholes are not the same.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
To compare non-unit fractions, the whole must be the same for each fraction. When you compare fractions with the same denominator, the greater the numerator the greater the fraction .
2. Use this key word in a maths sentence and explain it clearly. 'Denominator'
A denominator is the bottom number written in a fraction. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils may try to compare fractions where the wholes are not the same. Correction: It's important that pupils understand that for comparison of fractions the wholes must be the same. This lesson uses one example of comparing distances in miles versus distance in kilometres as well as comparing pizzas of different shape and size.
More Lessons In This Unit
- Compare fractions with the same numerator Study Guide
- Compare non-unit fractions including those equal to 1 Study Guide
- Explain that non-unit fractions are made of more than one unit fraction Study Guide
- Identify non-unit fractions Study Guide
- Identifying equal parts in a whole in different contexts Study Guide
- Place fractions between 0 and 1 on a number line Study Guide
- Review comparing unit fractions Study Guide
- Use knowledge of non-unit fractions to solve problems Study Guide
- Use knowledge of unit fractions to find one whole Study Guide
Browse all guides in the Year 3 Maths guide library.