Extra Sig Fig Practice Sample Problems How many significant figures
Extra Sig Fig Practice ROUNDING RULES TO REMEMBER Look at the digit to the RIGHT of your last significant figure to round off ( all examples are being rounded to three sig. figs) 1.
# greater than 5 ----- increase the sig fig by 1 (42.68 g = 42.7 g)
2.
# less than 5 ---sig fig stays the same (17.32 m = 17.3 m)
3.
If # IS 5, followed by a NON-ZERO digit ---increase sig fig by 1( 2.7851 cm = 2.79 cm)
4.
If # IS 5, preceded by an ODD digit ---- increase by 1(4.635 kg = 4.64 kg)
5.
If # IS 5, preceded by an EVEN digit—stay the same(78.65 ml = 78.6 ml)
Sample Problems How many significant figures does each of the following contain? 1. 5400 km
7. 40. L
2. 456.78 mg
8. 0.041 cg
3. 4.03 m
9. 65 000 g
4. 8050 mg
10. 1.90 x 104 mg
5. 4.00 mm
11. 0.00010 mm
6. 400 mL Perform the calculation and round to the correct number of significant figures 11. 55.43 mg + 44.333mg + 5.31mg + 9mg
16. 17.12 cm + 3400 cm =
12. 890 m + 90.12m + 890.8m m=
17. 35.010 g / 1.23 cm3 =
13. 6900 cm – 45.44 cm =
18. 1200 mm – 62.5 mm =
14. 343.4 g / 6 ml =
19. 0.1700 cm x 1600 cm x 19 cm=
15. 0.000000003 mm x 30.03030mm =
20. 15.05 g + 0.0044 g+ 12.34g=
Determine the number of significant digits in each of the following: 2330 cm
8.701 °C
1,843.02 L
0.5000 Ml
2.00 km
365.00 kg
0.0001010450 sec
2000.12 mm
3.65 kg
704,000 h
Report answers to the following using proper significant figures:
11. 3.414 s + 10.02 s + 58.325 s + 0.00098 s
12. 2.326 h – 0.10408 h
13. 10.19 m x 0.013 m
14. 140.01 cm x 26.042 cm x 0.0159 cm
15. 80.23 m / 2.4 s
# greater than 5 ----- increase the sig fig by 1 (42.68 g = 42.7 g)
2.
# less than 5 ---sig fig stays the same (17.32 m = 17.3 m)
3.
If # IS 5, followed by a NON-ZERO digit ---increase sig fig by 1( 2.7851 cm = 2.79 cm)
4.
If # IS 5, preceded by an ODD digit ---- increase by 1(4.635 kg = 4.64 kg)
5.
If # IS 5, preceded by an EVEN digit—stay the same(78.65 ml = 78.6 ml)
Sample Problems How many significant figures does each of the following contain? 1. 5400 km
7. 40. L
2. 456.78 mg
8. 0.041 cg
3. 4.03 m
9. 65 000 g
4. 8050 mg
10. 1.90 x 104 mg
5. 4.00 mm
11. 0.00010 mm
6. 400 mL Perform the calculation and round to the correct number of significant figures 11. 55.43 mg + 44.333mg + 5.31mg + 9mg
16. 17.12 cm + 3400 cm =
12. 890 m + 90.12m + 890.8m m=
17. 35.010 g / 1.23 cm3 =
13. 6900 cm – 45.44 cm =
18. 1200 mm – 62.5 mm =
14. 343.4 g / 6 ml =
19. 0.1700 cm x 1600 cm x 19 cm=
15. 0.000000003 mm x 30.03030mm =
20. 15.05 g + 0.0044 g+ 12.34g=
Determine the number of significant digits in each of the following: 2330 cm
8.701 °C
1,843.02 L
0.5000 Ml
2.00 km
365.00 kg
0.0001010450 sec
2000.12 mm
3.65 kg
704,000 h
Report answers to the following using proper significant figures:
11. 3.414 s + 10.02 s + 58.325 s + 0.00098 s
12. 2.326 h – 0.10408 h
13. 10.19 m x 0.013 m
14. 140.01 cm x 26.042 cm x 0.0159 cm
15. 80.23 m / 2.4 s
