1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Significant Figures Calculation

  1. Sep 3, 2014 #1
    1. The problem statement, all variables and given/known data

    Add the following:

    (2.526/3.1) + (0.470/0.623) + (80.705/0.4326)


    2. The attempt at a solution

    = (2.526/3.1) + (0.470/0.623) + (80.705/0.4326)
    = (0.81) + (0.754) + (186.6)
    = 188.2

    I have calculated the answer (using sig figs) to be 188.2, however, the answer key says it is 188.1.
     
  2. jcsd
  3. Sep 3, 2014 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Don't round off until the last step.
     
  4. Sep 3, 2014 #3
    = (2.526/3.1) + (0.470/0.623) + (80.705/0.4326)
    = (0.8148) + (0.7544) + (186.55)
    = 188.1192

    If I don't apply sig figs to each step, then how would I know how many sig figs there would be in the final answer?
     
  5. Sep 3, 2014 #4

    Doc Al

    User Avatar

    Staff: Mentor

    You can know how many sig figs in each step and still not round off until the end.
     
  6. Sep 3, 2014 #5
    Ok. I see. Thank you.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Significant Figures Calculation
  1. Significant Figures. (Replies: 2)

  2. Significant Figures (Replies: 7)

  3. Significant figures (Replies: 2)

Loading...