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Math Help - Adding and subsctracting fractions with more than two parts

  1. #1
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    Adding and subsctracting fractions with more than two parts

    i need to do 0.333 + 0.25 + 0.083 in fractions now i know how to do two parts by finding the common factor and multiplying but how do i do three parts?
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  2. #2
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    Re: Adding and subsctracting fractions with more than two parts

    Quote Originally Posted by ariel32 View Post
    i need to do 0.333 + 0.25 + 0.083 in fractions now i know how to do two parts by finding the common factor and multiplying but how do i do three parts?
    You don't need to do that.
    \frac{333}{1000}+\frac{250}{1000}+\frac{83}{1000}=  ~?
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  3. #3
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    Re: Adding and subsctracting fractions with more than two parts

    Also, the sum of more than two numbers can always be represented as a repeated sum of just two numbers at a time. Thus, 0.333 + 0.25 + 0.083 is either (0.333 + 0.25) + 0.083 or 0.333 + (0.25 + 0.083) (these two expressions give the same result).
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  4. #4
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    Re: Adding and subsctracting fractions with more than two parts

    I suspect that the problem was really \frac{1}{3}+ \frac{1}{4}+ \frac{1}{12}
    Since 12= 3(4), the "least common denominator" is 12. Multiplying both numerator and denominator of the first fraction by 4 and of the second fraction by 3 gives
    \frac{4}{12}+ \frac{3}{12}+ \frac{1}{12}.

    However, ariel32, the question you asked is not at all that problem. While ".333" and ".083" are approximations to \frac{1}{3} and \frac{1}{12}, they are not equal to them. In the future, please state your problem exactly as you were given it.
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