A quick estimate for a calculation is obtained from using approximate values, often rounded to 1 significant figure.

Considering a route

Maths

Maths and the environment

Jacob boards a bus at 13:51. He alights the bus at 14:28. How many minutes did he spend on the bus?

A car travels 40 miles per gallon. Therefore, it consumes {{}} gallons per mile.

1 gallon ≈ 4.546 litres. Use this approximation to convert 12 litres to gallons. Give your answer accurate to 3 significant figures.

Petrol is sold for 142.9 p per litre. 1 gallon ≈ 4.546 litres. How much would 2.5 gallons of petrol cost? Give your answer in pence to the nearest penny.

A person drives 8.2 miles by car. On average, their car travels 50 miles per gallon of petrol. Which calculation would find the amount of petrol consumed during the journey, in gallons?

Adult bus tickets cost £3.50 each way. Children bus tickets cost £1.80 each way. Two adults and three children all make a two-way journey by bus. The total cost of their bus tickets is £{{}}.

A quick __________ for a calculation is obtained from using approximate values, often rounded to 1 significant figure.

Adult bus tickets cost £3 each. Children bus tickets cost £1.50 each. Two adults and three children travel together by bus. What would be the total cost of their bus tickets?

How many minutes are there between 9:48 am and 10:15 am?

A car travels 70 miles per gallon of petrol. How many miles could it travel using 4.5 gallons of petrol?

Petrol costs 146.9 p per litre. Therefore 20 litres of petrol would cost £{{}}.

1 imperial gallon is approximately 4.546 litres. Starting with the smallest, sort the measurements in order of volume.

Starter Quiz