P 5.2 (pg 2 of 2) Significant Figures
Scientific Notation
1. Put the following into scientific notation:
P 5.2 (pg 2 of 2) Significant Figures
a. 4589200000
b. 0.000850
c. 0.000759
d. 750300
e. Put this last one into scientific notation represented with ONLY three significant figures.
93798889
P 5.2 (pg 2 of 2) Significant Figures
Significant Figures
Underline the significant figures are in each measurement.
P 5.2 (pg 2 of 2) Significant Figures
1. 143 g
2. 0.00740 cm
3. 8.750 × 108 mg
4. 12.17ºC
5. 10800 m
6. 5.0 dm
P 5.2 (pg 2 of 2) Significant Figures
Round off each of these measurements to 3 significant figures.
P 5.2 (pg 2 of 2) Significant Figures
7. 98.473 L
8. 0.0007632 cg
9. 57.084 m
10. 12.17ºC
11. 7.4983 × 104 mm
12. 1764.9 mL
13. 69998 kg
P 5.2 (pg 2 of 2) Significant Figures
Assume that all of the numbers are measured quantities, and that the measuring device was used correctly.
Round the answer to the correct number of sig figs based on the numbers in the problem.
P 5.2 (pg 2 of 2) Significant Figures
14. 0.256 × 150
15. 0.0043 × 0.8000
16.
17. 10500 × 30.62
18. 4.2 + 0.17763
19. 78.525 + 36.4
20. 78.575 + 36.4
21. 0.3060 × 50
22.
23.
24.
25. 12.5 × 0.0023 × 0.1000
26.
27.
28. 2.4 – 12.93
29. 2.000 × 55.0
30. 0.12 + 23.687
31. 100 + 1.5
32.
33.
34.
35.
36. 1780 + 27 + 0.89
37.
38. 102 – 8.07
39. 55 × 3.780
40.
41. 3400 × 1.850
P 5.2 (pg 2 of 2) Significant Figures
P 5.3 (pg 3 of 3) Significant Figures ANSWERS
Underlining sig figs
1. 143 g
2. 0.00740 cm
3. 8.750 ×108 mg
4. 12.17ºC
5. 10800 m
6. 5.0 dm
Rounding off to 3 sig figs
7. 98.5 L
8. 0.000763 cg
9. 57.1 m
10. 12.2ºC
11. 7.50 ×104 mm
12. 1760 ml
13. 7.00 × 104 kg
Calculate and round off appropriately
14. 38 (2sf)
15. 0.0034 (2sf)
16. 800 » 8.0 × 102 (2sf)
17. 322000 (3sf)
18. 4.4 (10ths place)
19. 114.9 (10ths place)
20. 115.0 (10ths place)
21. 20 (1sf)
22. 0.093 (2sf)
23. 2.0 (2 sf)
24. 0.238 (3 sf)
25. 0.0029 (2 sf)
26. 0.00034 (2 sf)
27. 30 (1sf)
28. −10.5 (10ths place)
29. 1.10 × 102 (3sf)
30. 23.81 (100ths place)
31. 100 (100’s place)
32. 0.10 (2sf)
33. 9000 (1 sf)
34. 20 or 30 (round up or down) (1 sf)
35. 5000 » 5.0 × 103 (2 sf)
36. 1810 (10’s place)
37. 1.6 (2 sf)
38. 94 (1’s place)
39. 210 (2sf)
40. 14 (2sf)
41. 6300 (2sf)