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Sig Fig Rules:
 1. Non zero numbers always count
 2. Zeros trapped between non zeros always count.
 3. Zeros before non zeros do not count.
 4. Zeros after decimals always count

Sig Fig Examples
104.85 =
8.500 =
0.0006 =
500.0 =
 104.85 = 5
 8.500 = 4
 0.0006 = 1
 500.0 = 4

Sig Fig with Scientific Notation
5.000 x 10^{3} =
5.00 x 10^{3} =
5.0 x 10^{3} =
 5.000 x 10^{3} = 4
 5.00 x 10^{3} = 3
 5.0 x 10^{3} = 2

Adding and Subtracting Sig Fig: always....
... round to the figure with the lowest number of digits following the decimal point.
 i.e. 1.0342193 + 2.3 = 3.3342193
 Round to 1 dp = 3.3

Multiplying and Dividing: always...
... round to the figure with the lowest number of significant figures.
 e.g. 30.3 x 0.004 = 0.1212
 Round to 1 sf = 0.1

