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Commutative property of numbers and uncertainity

  1. Sep 13, 2010 #1
    when solving physics problems we have to do various calculation to find a quantity but the results are different if we round up in every operation than if we round up in only the final operation? I never cared before but sometimes I see big differences especially when dealing with numbers with only 1 significant figures.
     
  2. jcsd
  3. Sep 14, 2010 #2

    mathman

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    You're right. It is always more accurate to round at the end only.
     
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