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the claim
Significant figures in a measurement consist of all known digits plus the first estimated digit.
the verdict
SUPPORTED
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Recorded sources
7 sources for · 0 against
AS REPORTEDno primary record reached; this is what the reporting says
Is it true that significant figures in a measurement consist of all known digits plus the first estimated digit?
Yes. Multiple reference and textbook sources confirm that significant figures in a measurement consist of all the reliably known digits plus the final estimated digit.
Verdict: SUPPORTED · 7 sources for, 0 against · Last checked
How claims like this are judged
Judged against reference works: claims of this kind are settled by reference works, not journal abstracts.
Evidence for · 7
Reference article covering this claim directly
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Wikipedia: Significant figures. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Significant_figures
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More for · 6
States explicitly that significant figures represent all known digits plus the first estimated one.
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LibreTexts: LibreTexts: 2.02 Expressing Numbers Significant Figures. (n.d.). LibreTexts. https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Chem_51/02%3A_Measurements/2.02_Expressing_Numbers_-_Significant_Figures
Notes that the last digit is estimated and forms part of the significant figures.
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OpenStax: OpenStax College Physics: 1.3 Accuracy, Precision, and Significant Figures. (n.d.). OpenStax. https://openstax.org/books/college-physics/pages/4bba6a1c-a0e6-45c0-988c-0d5c23425670@
States total number of exact digits plus the estimated digit equals significant figures.
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Wikibooks: Wikibooks: Introductory Chemistry Online/Measurements and Atomic Structure. (n.d.). Wikibooks. https://en.wikibooks.org/wiki/Introductory_Chemistry_Online/Measurements_and_Atomic_Structure
Directly supports that significant figures represent all known digits plus the first estimated one.
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LibreTexts: LibreTexts: 1.05%3A Expressing Numbers Significant Figures. (n.d.). LibreTexts. https://chem.libretexts.org/Courses/University_of_Kansas/KU%3A_CHEM_110_GOB_Chemistry_(Sharpe_Elles)/01%3A_Chemistry_Matter_and_Measurement/1.05%3A_Expressing_Numbers_-_Significant_Figures
OpenStax: OpenStax College Physics for AP® Courses: 1.3 Accuracy, Precision, and Significant Figures
Notes the last digit written down is estimated and counted in significant figures.
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OpenStax: OpenStax College Physics for AP® Courses: 1.3 Accuracy, Precision, and Significant Figures. (n.d.). OpenStax. https://openstax.org/books/college-physics-ap-courses/pages/5ee69368-0ea2-4e36-9e51-b7b7512fb3af@
Confirms exact digits plus the estimated digit define the significant figures.
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Wikibooks: Wikibooks: Introductory Chemistry Online/Printable version. (n.d.). Wikibooks. https://en.wikibooks.org/wiki/Introductory_Chemistry_Online/Printable_version
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