SCIENTIFIC NOTATION AND SIGNIFICANT FIGURES
SCIENTIFIC NOTATION AND SIGNIFICANT FIGURES
I. Express in scientific notation. Assume three significant figures in each.
1. 315 1. ___________________
2. 25.2 2. ___________________
3. 86,500 3. ___________________
4. 0.00512 4. ___________________
5. 0.162 5. ___________________
6. 0.000724 6. ___________________
II. Express the following numbers as ordinary numbers
7. 2.12 x 102 7. ___________________
8. 2.17 x 10-3 8. ___________________
9. 8.92 x 10-1 9. ___________________
10. 7.90 x 107 10. __________________
11. 9.76 x 10-5 11. __________________
12. 4.20 x 104 12. __________________
III. Determine the number of significant figures in each number given.
13. 1000 cg 13. __________________
14. 2010 mL 14. __________________
15. 0.00125 km 15. __________________
16. 12.20610 dam 16. __________________
17. 24 cockroaches 17. __________________
18. 105 hL 18. __________________
19. 26 g 19. __________________
IV. Calculate the following, expressing your answers with the correct number of significant figures.
20. 25.01 m+ 55.2 m+ 0.002 m 20. __________________
21. 16000 mL + 5.95 mL 21. __________________
22. 14.26 g – 10.261 g 22. __________________
23. 20.000 m – 0.02 m 23. __________________
24. 26.2 km * 46.01 km 24. __________________
25. 0.00125 kg * 0.1256 kg 25. __________________
26. 80000 daL [pic] 25000 daL 26. __________________
27. 25.62 mg [pic] 0.25 mg 27. __________________
V. Calculate the following, expressing your answers in scientific notation with the correct number of significant figures.
28. (4.00 x 102) (3.00 x 1012) 28. __________________
29. (6.00 x 10-2) (4.00 x 1040) 29. __________________
30. (8.00 x 108) [pic] (2.00 x 106) 30. __________________
31. (4.00 x 10-10) [pic] (8.00 x 10-4) 31. __________________
32. (4.00 x 1012) * (9.00 x 10-10) * (7.00 x 10-12) 32. __________________
(8.00 x 106) (6.00 x 1018) (2.80 x 10-20) 33. __________________
33. (5.00 x 10-9) * (8.00 x 1020) * (6.00 x 10-8)
(2.00 x 10-12) (2.50 x 10-15) (3.60 x 107)
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