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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.

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OpenLearn - Rounding and estimation
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