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Math Help - order of operations

  1. #1
    jon w
    Guest

    order of operations

    Problem:


    4[-20+7(-2)]


    my solution:


    -20+7=-13

    -13(-2)=26

    4*26=104


    answer 104?
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  2. #2
    Super Member
    Joined
    Oct 2006
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    Re:

    Quote Originally Posted by jon w View Post
    Problem:


    4[-20+7(-2)]


    my solution:


    -20+7=-13

    -13(-2)=26

    4*26=104


    answer 104?
    Order of Operations = PEMDAS

    4[-20+7(-2)]
    = 4[-20-14]
    = -80-56
    = -136

    So you are wrong...
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