1. Significant Figures

2. Rule 1: Digits other than zero are significant 96 g = 2 Sig Figs 152 g = __________ Sig Figs 61.4 g = 3 Sig Figs21.567 g = __________ Sig Figs 0.52 g = 2 Sig Figs0.763 g = __________ Sig Figs

3. Rule 2: Zeros appearing between nonzero digits are significant 306 g = 3 Sig Figs40601 g = __________ Sig Figs 5.029 g = 4 Sig Figs7000.01 g = __________ Sig Figs 4.007 g = 4 Sig Figs21010101 g = __________ Sig Figs

4. Rule 3: Zeros appearing in front of all nonzero digits are NOT significant. 0.095897 m = 5 Sig Figs0.0004526 kg = __________ Sig Figs 0.0009 kg = 1 Sig Fig0.00721 kg = __________ Sig Figs

5. Rule 4: Zeros after or to the right of the decimal point are significant. 9.000 000 000 = 10 Sig Figs7.940 m = __________ Sig Figs 4.7200 m = 5 Sig Figs1.00000 m = __________ Sig Figs 82.0 m = 3 Sig Figs789.10 m = __________ Sig Figs

6. Rule 5: Zeros at the end of a number are significant if a decimal point is present. 7000 kg = 1 Sig Figs100100 kg = __________ Sig Figs 7000. kg = 4 Sig Figs200. m = __________ Sig Figs

7. Rule 6: Only the coefficient in scientific notation is significant, not the power or exponent. 3.64 x 10 4 m = 3 Sig Figs0.210 x 10 3 m = __________ Sig Figs 8.067 x 10 3 m= 4 Sig Figs9.416 x 10 8 m = __________ Sig Figs 6.4800 x 10 7 m = 5 Sig Figs410.0 x 10 3 m = __________ Sig Figs 1 x 10 4 m = __________ Sig Figs 78400 x 10 -3 m = __________ Sig Figs

8. Addition/Subtraction: After adding or subtracting, round off answer to least accurate number. 13.1 10.5 126.23 + 2.34 9 91.4 15.44 ==> + 76.26 +434.163 95.76 ==> 641.793 ==>

9. Multiplication/Division: After multiplying or dividing, round off answer to least number of significant figures. 5.63 432.1 632 x 0.20 x 0.002 ÷ 4.3 1.126 ==> ==>