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Math Help - Order of operations

  1. #1
    blahgrl123
    Guest

    Question I need super big help

    On my math homework there are problems that confuse me...

    1) -[21 + (-7)] = ( -9 +11) =

    Help!!!!!!!
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  2. #2
    Site Founder MathGuru's Avatar
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    Are these two different problems?

    -[21 + (-7)] =
    -[21 -7] =
    -[14] =
    -14 = -14


    (-9 +11) =
    -9 +11 =
    11 - 9 =
    2 = 2
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