Sig Fig Review Sheet w/ Practice Qs & Answers

# Sig Fig Review Sheet w/ Practice Qs & Answers - Math...

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Math Review Worksheet: Significant Figures / Scientific Notation / Algebra SIGNIFICANT FIGURES Any measurement is inaccurate to some degree. The inaccuracy stems from several factors -- the precision of the measuring device used, errors by the person doing the measurement, a faulty experimental technique, etc. In scientific investigations, communicating our uncertainty in a measurement is equally important as the measurement itself. We convey our uncertainty in measured quantities by abiding by the rules of significant figures. 1. Significant figures in a measurement include all of the digits that are known precisely plus one last digit that is estimated. 2. Non-zero digits are always significant. 1 03 .23 0002 3. All final zeros after the decimal point are significant. 12.740 ; 0.0420 4. Zeros between two other significant digits are always significant. 10 .0 ; 200 4 ; 6.00 0 5. Zeros used only for spacing the decimal point are not significant. 100 ; .00000 233 6. If you add or subtract, the answer is rounded to the same number of decimal places as the measurement with the least number of decimal places. 7. If you multiply or divide two numbers, the answer is rounded off to number of significant figures in the least precise term used in calculation (i.e. number with

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## This note was uploaded on 04/18/2008 for the course MATH 148 taught by Professor Mcginnis during the Fall '08 term at Ohio State.

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Sig Fig Review Sheet w/ Practice Qs & Answers - Math...

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