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Rounding and estimation
Rounding and estimation

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Learning outcomes

After studying this course, you should be able to:

  • round a given whole number to the nearest 10, 100, 1000 and so on

  • round a decimal number to a given number of decimal places or significant figures

  • use rounded numbers to find rough estimates for calculations

  • use a calculator for decimal calculations involving +, −, × and ÷, giving the answer to a specified accuracy (e.g. decimal places or significant figures) and checking the answer by finding a rough estimate

  • check the answers to calculations by ensuring that the correct calculation has been done, in the correct order.