M3.6.3 For the adult
Area of rectangles
How many tiles will cover my floor?
What this chapter teaches
Area is the space inside a shape, counted in squares. A rectangle has length × width squares. An L shape is split into rectangles, or filled in and the corner taken away. One square metre is 100 cm by 100 cm, which is 10 000 square centimetres.
Three questions to ask
There is no one right wording. Listen for the idea.
- How many tiles 1 m by 1 m cover a floor 7 m long and 3 m wide?
- Can you split an L shape into two rectangles in two different ways?
- Why is a square metre 10 000 square centimetres, and not 100?
After the chapter, the learner can
- Find the area of a rectangle as length × width
- Find the area of an L shape by splitting it
- Explain why 1 m² is 10 000 cm²
What they copy into their notebook
Area is the space inside, counted in squares. Rectangle: length × width. L shape: split it, or fill and take away. 1 m² = 100 cm × 100 cm = 10 000 cm².