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Published byKelly Hancock Modified over 9 years ago

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Rules For Significant Figures

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1. You can estimate one significant figure past the smallest division on an analog measuring device

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2. Every non-zero digit is significant ex. 24.7 – 3 sig figs

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3. Zeros between non- zeros are significant ex. 24.0007 – 6 sig figs

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4. Left most zeros in front of non-zeros are NOT SIGNIFICANT ex. 0.0099 – 2 sig figs

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5. Zeros past a number to the right of a decimal are significant Ex. 43.00 – 4 sig figs

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6. Zeros before understood decimals are NOT SIGNIFICANT ex. 100 – 1 sig fig

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7. Zeros before indicated decimal are significant ex. 100. – 3 sig figs

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8. Counts and exact quantities are infinitely significant ex. 12 eggs in a dozen 5280 ft in 1 mile

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9. Adding and subtracting – retain as many places to the right of the decimal as the original number with the least

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10. Multiplying and dividing– retain as many significant figures as the original number with the least

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