Sig Figs simalized

130.250100 

9 Significant Figures

• All nonzero digits are significant. 

• Zeros between nonzero digits are significant

• Trailing zeros are significant only if a decimal point is shown. 

130

2 Significant Figures 

• The final zero is not significant because no decimal point is shown.

130. 

3 Significant Figures and can be written in scientific notation as 130. = 1.30 × 10² 

The decimal point indicates that the trailing zero is significant. Using scientific notation is often preferred because it clearly shows the number of significant figures.

0.002500100 

7 Significant Figures 

• Zeros at the beginning of a number (Leading zeros ) are not significant. 

• Trailing zeros after a decimal are significant. In this number, the digits 2, 5, 0, 0, 1, 0, and 0 are significant.

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0.931 and 1.03 

3 Significant Figures

• Leading zeros are not significant; all other digits are significant.