- Change 3.2 kg to grams.
- Change 450 cm to metres.
- Change 2.5 litres to millilitres.
- Leah buys 3 bags of flour. Each bag has a mass of 1.25 kg. Work out the total mass of the flour in grams.
Compound measures
12 original questions, 37 marks. Type your answers below for an instant mark and a score (algebra in any equivalent form, e.g. 2sqrt(3) or 2√3), or print the worksheet, mark it with the answers sheet, and use the solutions to see every step written out by hand.
The questions
Change 3.5 m2 to cm2.
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A model of a car is made to a scale of 1 : 24.
- The model is 18 cm long. Work out the length of the real car in metres.
- The real car is 1.44 m high. Work out the height of the model in centimetres.
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Here is part of a bus timetable.
| Bus station | 07:45 | 08:15 | 08:50 |
|---|---|---|---|
| Market Square | 07:58 | 08:28 | 09:03 |
| Park Road | 08:06 | 08:36 | 09:11 |
| Oakfield School | 08:19 | 08:49 | 09:24 |
- How many minutes does the 07:45 bus take to get from the Bus station to Oakfield School?
- Kemi gets on the bus at Market Square. She must be at Oakfield School by 08:45. Write down the time of the latest bus she can catch from Market Square.
- How many minutes are there between the first bus and the second bus at Park Road?
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The diagram shows the speedometer of a car.
- Write down the speed shown on the speedometer.
- Use 5 miles = 8 kilometres to change this speed to km/h.
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A block of pine wood has a volume of 240 cm3.
The density of the pine wood is 0.65 g/cm3.
Work out the mass of the block.
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Amber runs 15.6 km in 1 hour 30 minutes.
Work out her average speed in km/h.
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Mr Hussain drives 135 miles on a motorway at an average speed of 45 mph.
- Work out how long this part of the journey takes.
He then drives for 1 hour 20 minutes at an average speed of 60 mph.
- Work out the distance he drives in this part.
- Work out his average speed for the whole journey. Give your answer correct to 1 decimal place.
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A cheetah runs 150 m in 5 seconds.
- Work out its average speed in metres per second.
- Change your answer to kilometres per hour. Use speed in km/h = speed in m/s × 60 × 601000
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Water flows out of a pipe at a rate of 0.9 m3 per minute.
1 m3 = 1000 litres
Work out the rate of flow in litres per second.
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A go-kart is moving at 4 m/s. It speeds up with an acceleration of 2.5 m/s² for 6 seconds.
Use the formulae
v = u + at s = ut + 12at2
where u is the starting speed, v is the final speed, a is the acceleration, t is the time and s is the distance travelled.
- Work out the speed of the go-kart after 6 seconds.
- Work out the distance it travels in the 6 seconds.
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A paperweight is made of brass with a volume of 60 cm3.
The density of brass is 8.4 g/cm3.
A delivery box can hold a total mass of at most 4.5 kg.
Work out the greatest number of these paperweights the box can hold.
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Your score
Answer the questions above and your score appears here.
Every question here is original and written by Robinson Tuition. It follows the Key Stage 3 programme of study; Year 9 sheets end with extension questions for top sets.
All Year 8 topics
- BIDMAS (order of operations)
- Rounding and estimating
- Negative numbers
- Powers, roots and index laws
- Primes, HCF and LCM
- Fractions
- Area and perimeter
- Area and circumference of circles
- Compound measures
- Coordinates
- Linear and quadratic graphs
- Algebraic expressions
- Solving equations and changing the subject
- Linear inequalities
- Sequences
- Angles in parallel lines
- Angles in polygons
- Percentages and percentage change
- Ratio and proportion
- Constructions
- Congruent and similar shapes
- Surface area and volume
- Averages and statistical measures
- Scatter graphs and stem and leaf
- Probability