Formulae
Substitute values into formulae; rearrange simple formulae; derive formulae from context
What you'll learn
- 1
A formula is a short maths rule that helps you work something out — like a recipe for numbers! 🍪
- 2
What does a formula help you do?
- 3
Let's use a formula to find the area of a rectangle that is 5 cm long and 3 cm wide. 📏
- 4
Use the formula to find the area of a 4 cm by 6 cm rectangle. Drag the tiles to make the rectangle.
- 5
What is the area of a 4 cm by 6 cm rectangle? (Use the formula length × width)
- 6
Another formula: The perimeter of a rectangle is (length + width) × 2. That means add the length and width, then double it. 🟦
- 7
What is the perimeter of a rectangle with length 5 cm and width 3 cm? (Use (l + w) × 2)
Practise Formulae with Whizlo
Free AI-tutored lessons, unlimited practice questions, and progress tracking for ages 11–13. Aligned to the UK National Curriculum.