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Definition of Significant figures

Significant figures Definition from Language, Idioms & Slang Dictionaries & Glossaries
hEnglish - advanced version

significant figures
(arith.), the figures which remain to any number, or decimal fraction, after the ciphers at the right or left are canceled. thus, the significant figures of 25,000, or of0025, are 25...
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Significant figures Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
The significant figures of a number are those digits that carry meaning contributing to its precision. This includes all digits except:
  • All leading zeros;
  • Trailing zeros when they are merely placeholders to indicate the scale of the number (exact rules are explained at identifying significant figures); and
  • Spurious digits introduced, for example, by calculations carried out to greater precision than that of the original data, or measurements reported to a greater precision than the equipment supports.

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