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Significant figures

Stuck? Read the notes

	Answers
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18

How many significant figures have each of the following numbers got?

1. 15.714
2. 325
3. 4866
4. 0.000647
5. 6718.0001
6. 0.0000000120000001
7. 160.05

Round each of the following to the given number of significant figures

8. 227.57 (4 sf)
9. 122.97 (3 sf)
10. 1572 (2 sf)
11. 9761 (2 sf)
12. 14722511 (2 sf)
13. 0.0000072 (1 sf)

Use your calculator to find the answer to each of the following. Round your answer to the required number of significant figures:

14. 2317 \div 35 (5 sf)
15. 138 \times 483 (2 sf)
16. 1.45 \times 7.732 (3 sf)
17. 21^{3} (2 sf)

And finally...

18. What is 9.999 rounded to 1 s.f.?