Round 47 384 to 2 significant figures.
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Practise IGCSE 0580 questions in the style of recent Extended past papers, organised by syllabus subtopic. Each set comes with an examiner-style mark scheme and a downloadable worksheet.
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These Estimation Topical Past Paper Questions are written in the style of recent Cambridge IGCSE Mathematics 0580 Extended papers and grouped by the Number (E1.9) section of the 2025–2027 syllabus. Use them to revise the exact skills examiners test in this part of the course.
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Round values to a specified degree of accuracy (decimal places and significant figures), make estimates for calculations, and round answers sensibly in context.
Round 47 384 to 2 significant figures.
Round 6.749 to 1 decimal place.
[1 mark]By rounding each number to 1 significant figure, estimate the value of (47.8 × 21.3) ÷ 9.7.
[2 marks]Write 0.020 483 correct to 3 significant figures.
[2 marks]How many significant figures does the number 0.004 08 have?
A rectangular field is measured as 187 m long and 49 m wide.
By rounding each measurement to 1 significant figure, estimate the area of the field.
[2 marks]Calculate the actual area, then find the percentage error of your estimate compared to the actual area. Give the percentage error correct to 1 decimal place.
[1 mark]A box can hold a maximum of 24 cans. 350 cans need to be packed into boxes. Calculate the minimum number of boxes required.
[2 marks]By rounding both numbers to 1 significant figure, estimate the value of 786 ÷ 41.
[1 mark]Calculate 786 ÷ 41 to 2 decimal places. Hence find the absolute error of your estimate from part (a).
[1 mark]