What does it mean, formally, when we say that a digit in a number is a significant figure?
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$\begingroup$ It generally means ignoring the lower order digits in a number that resolves to too great a detail given the approximations in a calculation, or also in an experiment, the estimated errors. $\endgroup$– Mozibur UllahJan 18, 2018 at 12:10
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1$\begingroup$ More on significant figures. $\endgroup$– Qmechanic ♦Jan 18, 2018 at 12:39
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