Results 1 to 2 of 2

Math Help - Significant Figures

  1. #1
    MHF Contributor Quick's Avatar
    Joined
    May 2006
    From
    New England
    Posts
    1,024

    Significant Figures

    my physics teacher is giving a test tomorrow on this and, no surprise, I didn't pay attention.

    I know everything about sig figs (like 3.02+4.00001=7.02) but have no idea when it comes to multiplication (like 3.02*4.00001)

    I'm hoping there is a standard method and that someone can tell me...
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,924
    Thanks
    332
    Awards
    1
    Quote Originally Posted by Quick View Post
    my physics teacher is giving a test tomorrow on this and, no surprise, I didn't pay attention.

    I know everything about sig figs (like 3.02+4.00001=7.02) but have no idea when it comes to multiplication (like 3.02*4.00001)

    I'm hoping there is a standard method and that someone can tell me...
    Multiplication, unlike addition and subtraction, has a simple rule. Figure out the significant digits in each factor. Then choose the smallest one. So if you are multiplying 3.02*4.00001 the 3.02 has 3 digits, the 4.00001 has 6 digits, so the answer will have the smaller number, 3 digits. So the answer is 12.0800302 --> 12.1

    Division works the same way.

    -Dan
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Significant Figures
    Posted in the Algebra Forum
    Replies: 2
    Last Post: September 11th 2011, 01:05 PM
  2. 900 to 1, 2, or 3 significant figures?
    Posted in the Algebra Forum
    Replies: 2
    Last Post: February 7th 2011, 03:14 PM
  3. significant figures
    Posted in the Math Topics Forum
    Replies: 4
    Last Post: July 23rd 2009, 12:13 PM
  4. significant figures
    Posted in the Algebra Forum
    Replies: 1
    Last Post: January 11th 2009, 11:06 AM
  5. Significant Figures
    Posted in the Geometry Forum
    Replies: 1
    Last Post: September 29th 2007, 09:34 AM

Search Tags


/mathhelpforum @mathhelpforum