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Avrunda till n gällande siffror

Oftast väljer man att avrunda ett tal till ett visst antal gällande siffror. Alla siffror skilda från noll i ett avrundat tal är gällande. Nollor räknas som gällande siffror om:

  • De ligger mellan två gällande siffor t.ex. 1023.
  • De ligger i slutet av ett decimaltal t.ex. 2.1200.

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