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Rounding - which way?

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    Hi all,

    I'm doing OCR AS Physics.

    If I do a calculation and get a decimal answer of 14.5485, I'm a bit confused how to round this to, say, 3 SF.

    My maths teacher says I should round it down to 14.5, but my Physics teacher rounds from the right, which would make it 14.6 (because the 8 takes the 4 up to 5, which rounds up to 14.6)

    Any ideas? Which one's right?


  2. Offline

    I've always been told 14.5 and it's the only one that makes sense.
  3. Offline

    (Original post by mf2004)
    I've always been told 14.5 and it's the only one that makes sense.

    Basic rule of mathematics.

    0.0485 < 0.0500

    Must be over 5 to round up, less than 5 you do not.
  4. Offline

    that's what I thought.

    Great, thanks.

  5. Offline

    (Original post by dazed&confused)
    that's what I thought.

    Great, thanks.

    You're welcome Good luck in your exams!


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