Interior designer | Maths | Quizalize & Oak National Academy

Starter quiz

The ______ is the size of the surface and states the number of unit squares needed to completely cover that surface.
- 'area' ✓
The dimensions of a rectangular door are 1.98 m by 76 cm. Which of the following are equivalent measurements of the same door?
- 198 cm by 76 cm ✓
- 19.8 cm by 76 cm
- 19.8 cm by 0.76 m
- 198 cm by 0.76 m ✓
The dimensions of a rectangular door are 1.98 m by 76 cm. What is the area of the door in cm $^2$ ? (You do not need to state the units with your answer.)
- '15 048' ✓
A rectangular garden with dimensions shown is completely covered with grass. The exception is the circular pond (indicated on the diagram). What is the area of the garden?
- 20 m $^2$
- 100 m $^2$
- 120 m $^2$ ✓
- 140 m $^2$
A rectangular garden with dimensions shown is completely covered with grass. The exception is the circular pond (indicated on the diagram). What is the area of the pond? (To the nearest integer.)
- 20 m $^2$ ✓
- 100 m $^2$
- 120 m $^2$
- 140 m $^2$
A rectangular garden with dimensions shown is completely covered with grass. The exception is the circular pond (indicated on the diagram). What is the area covered by grass? (To the nearest integer.)
- 20 m $^2$
- 100 m $^2$ ✓
- 120 m $^2$
- 140 m $^2$

Exit quiz

The area is the size of the surface and states the number of unit squares needed to completely ______ that surface.
- 'cover' ✓
Aisha wants to paint the ceilings in a house. The coverage is 11 m $^2$ per litre and tubs are 10 litres. What is the area (in m $^2$ ) that one tub can cover?
- '110' ✓
Aisha wants to paint the ceilings in a house. One tub of paint covers 110 m $^2$ . The area of the ceilings is 98 m $^2$ and this must be painted twice. How many tubs of paint are needed?
- '2' ✓
Calculate the cost per metre of the 2.4 metre length. Give your answer in pounds to the nearest penny.
- '£1.96' ✓
Calculate the cost per metre of the 3.6 metre length. Give your answer in pounds to the nearest penny.
- '£1.89' ✓
Which length is the best value for money based on the cost per metre?
- 2.4 m
- 3 m
- 3.6 m
- 4.2 m
- 4.8 m ✓

Worksheet

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Presentation

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Lesson Details

Key learning points

Measurements need to be accurate when designing a space
Quantities of materials need to be determined to minimise waste
Cost needs to be considered when pricing for a job

Common misconception

Rounding incorrectly for the stated context.

Pupils should consider the situation and ask - if rounding down, will there be enough? If rounding up, does this cover all cases? Thinking about the situation and trying different values to see what works can also help.

Keywords

Area - The area is the size of the surface and states the number of unit squares needed to completely cover that surface.