Year 6 - Maths
Explain how to represent ratio and to calculate unknown values
Ratio and proportion
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Study Guides
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 describe the relationship between two factors, representing the relationship in different ways. They will build to using a ratio grid to calculate unknown values.
Lesson Summary
You can explain how to use representations to calculate unknown values.
Key Notes
- Bar models can represent unequal sharing or many to many sharing with three variables.
- Representations show the relationship between the three variables.
- The representation helps to identify the calculations needed to solve the problem.
Vocabulary To Learn
- variable: A variable is a value which can be represented by more than one number within a situation or equation
Common Mistakes To Avoid
- Relating the elements of the multiplication and equation to the values in the bar models.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Bar models can represent unequal sharing or many to many sharing with three variables. Representations show the relationship between the three variables.
2. Use this key word in a maths sentence and explain it clearly. 'variable'
A variable is a value which can be represented by more than one number within a situation or equation. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Relating the elements of the multiplication and equation to the values in the bar models. Correction: Ensure that pupils can explain what the values in the equation represent and where they are in the bar models.
More Lessons In This Unit
- Describe the relationship between two factors in a ratio context Study Guide
- Explain how and why scaling is used to make and interpret maps Study Guide
- Identify and describe the relationship between irregular polygons using scale factors Study Guide
- Identify and describe the relationship between regular polygons using scale factors Study Guide
- Representing ratio in different ways Study Guide
- Solve problems involving ratio Study Guide
- Solve problems involving scaling and ratio Study Guide
- Use knowledge of multiplication and division to solve scaling problems in a range of contexts Study Guide
- Use multiplication and division to calculate unknown values in ratio problems Study Guide
Browse all guides in the Year 6 Maths guide library.