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Treating Defined Constants in Sig Figs

1. Defined constants have no uncertainty
2. Do not limit significant figures
3. Treat conversions as exact values
4. Only measured values set precision
5. Use decimal-place rules for add/subtract
6. Counted values have infinite sig figs

Common Sig Fig Mistakes to Avoid

1. Rounding every number prematurely
2. Using add/sub rules for mult/div
3. Not marking measured versus exact values

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