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Thread: Help with simple dividing

  1. #1
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    Help with simple dividing

    Wow, I still have some troubles when I have a fraction of a fraction:
    see here: https://screenshots.firefoxuserconte...ea945191d9.png
    How do I distinguish between 2 and 3?

    Like why this happened? https://screenshots.firefoxuserconte...1ee6cbb0eb.png --->
    https://screenshots.firefoxuserconte...e38429afd0.png

    Thanks.
    why the n wend to the nominator and not to the denominator? I'm confused...
    Last edited by IloveIl; Nov 21st 2017 at 10:00 AM.
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  2. #2
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    Re: Help with simple dividing

    Quote Originally Posted by IloveIl View Post
    20
    ---
    10
    --
    5
    20/10/5 = .4 (or 2/5)
    20/(10/5) = 10

    how come I have in my homework:
    1h^2 1h^2n^2
    -------- = ------------
    2mL^2 2mL^2
    --------
    n^2
    a/b/c = a*c/b

    If you can't follow that, see your teacher:
    no chalk and blackboard here...

    Or go learn here:
    https://www.mathsisfun.com/fractions_division.html
    Last edited by DenisB; Nov 21st 2017 at 09:25 AM.
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  3. #3
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    Re: Help with simple dividing

    Quote Originally Posted by DenisB View Post
    20/10/5 = .4 (or 2/5)
    20/(10/5) = 10

    a/b/c = a*c/b

    If you can't follow that, see your teacher:
    no chalk and blackboard here...

    Or go learn here:
    https://www.mathsisfun.com/fractions_division.html
    Let me refine my question:

    see here: https://screenshots.firefoxuserconte...ea945191d9.png
    How do I distinguish between 2 and 3?

    Like why this happened? https://screenshots.firefoxuserconte...1ee6cbb0eb.png --->
    https://screenshots.firefoxuserconte...e38429afd0.png

    Thanks.
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  4. #4
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    Re: Help with simple dividing

    Once more; GO HERE:
    https://www.mathsisfun.com/fractions_division.html

    Read up, then come back and ask a sensible question...
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  5. #5
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    Re: Help with simple dividing

    Quote Originally Posted by IloveIl View Post
    Let me refine my question:

    see here: https://screenshots.firefoxuserconte...ea945191d9.png
    How do I distinguish between 2 and 3?

    Like why this happened? https://screenshots.firefoxuserconte...1ee6cbb0eb.png --->
    https://screenshots.firefoxuserconte...e38429afd0.png

    Thanks.
    You can think of a variable as though it has parentheses around it. Example:

    x = \dfrac{b}{c}

    \dfrac{a}{x} = \dfrac{a}{(x)} = \dfrac{a}{\left( \tfrac{b}{c} \right) } = \dfrac{ac}{b}
    Thanks from IloveIl
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  6. #6
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    Re: Help with simple dividing

    Quote Originally Posted by DenisB View Post

    a/b/c = a*c/b

    That's an error. Please see below.

    If you can't follow that, see your teacher:
    no chalk and blackboard here...

    Or go learn here:
    https://www.mathsisfun.com/fractions_division.html
    a/b/c =

    (a/b)/c =

    \bigg(\dfrac{a}{b}\bigg) \div c \ =

    \bigg(\dfrac{a}{b}\bigg)\bigg(\dfrac{1}{c}\bigg) \ =

    \dfrac{a}{bc} \ \ or

    a/(bc)
    Last edited by greg1313; Nov 21st 2017 at 12:41 PM.
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  7. #7
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    Re: Help with simple dividing

    Whoops...(a/b)/c...to the corner I go...
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