Year 5 - Maths
Explain how to calculate the area of a rectangle using multiplication
Link area of rectangles to multiplication
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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 calculate the area of a rectangle using multiplication and use their knowledge of area to solve problems.
Lesson Summary
You will learn to explain how to use multiplication to calculate the area of a rectangle.
Key Notes
- The area of a rectangle is similar to an array for multiplication.
- Times table knowledge helps you to calculate the area of a rectangle.
- To find the area of a rectangle you multiply the length by the width.
Vocabulary To Learn
- Array: Items (including numbers) arranged in columns or rows are called arrays.
- Length: Length is the distance from one point to another.
- Width: Width is the distance from side to side.
Common Mistakes To Avoid
- Some pupils may still not have the automaticity of times tables facts useful for this lesson.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
The area of a rectangle is similar to an array for multiplication. Times table knowledge helps you to calculate the area of a rectangle.
2. Use this key word in a maths sentence and explain it clearly. 'Array'
Items (including numbers) arranged in columns or rows are called arrays. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Some pupils may still not have the automaticity of times tables facts useful for this lesson. Correction: Pre-teaching some tricky times tables facts by using counters for arrays will be useful. Consider allowing scaffolds within the lesson.
More Lessons In This Unit
- Calculate missing dimensions in rectangles and compound rectilinear shapes Study Guide
- Calculate the area of compound rectilinear shapes Study Guide
- Calculate the area of shapes made from 2 or more rectangles Study Guide
- Calculate the area of shapes made from 2 rectangles by decomposing the shape in different ways Study Guide
- Calculate the areas of rectangles using multiplication Study Guide
- Choose an efficient way to decompose a compound shape to calculate the area Study Guide
- Measure the area of flat shapes using square centimetres Study Guide
- Measure the area of flat shapes using square metres Study Guide
- Use knowledge of area to solve problems in a range of contexts Study Guide
Browse all guides in the Year 5 Maths guide library.