Year 3 - Maths
Explain the size of a part in relation to the whole
Unit fractions as part of a whole
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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 represent unit fractions in different ways, identifying the whole, the number of equal parts and the size of each part as a unit fraction, including tenths.
Lesson Summary
You will learn to explain the size of a part in relation to the whole.
Key Notes
- Parts of the same sized whole can be compared.
- A bigger or smaller part of the whole can be shown.
- Different parts of the same sized whole can be directly compared based on their size.
Vocabulary To Learn
- Whole: The whole is all the parts or everything, the total amount.
- Part: A part is some of the whole.
- Equal: We say that two or more things are equal if they have the same quantity or value.
- Unequal: We say that two or more things are unequal if they do not have the same quantity or value.
- Inequality: Inequality occurs when things are not equal. We use different symbols to show this.
Common Mistakes To Avoid
- The part changes size when the whole changes.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Parts of the same sized whole can be compared. A bigger or smaller part of the whole can be shown.
2. Use this key word in a maths sentence and explain it clearly. 'Whole'
The whole is all the parts or everything, the total amount. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: The part changes size when the whole changes. Correction: Use the bottles example in the slides to overcome this. Have a range of different sized containers for water and demonstrate the concept practically.
More Lessons In This Unit
- Construct a whole when given a part and the number of parts Study Guide
- Explain why a part can only be defined in relation to a whole Study Guide
- Identify a whole and the parts that make it up Study Guide
- Identify equal parts when they do not look the same Study Guide
- Identify how many equal parts a whole has been divided into Study Guide
- Identify the number of equal or unequal parts in a whole Study Guide
- Represent unit fractions in different ways Study Guide
- Solve problems involving identifying equal parts and the whole Study Guide
- Use fraction notation to describe an equal part of the whole Study Guide
Browse all guides in the Year 3 Maths guide library.