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Math Help - Order of opperations

  1. #1
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    Order of opperations

    -2(6)-[3(-7)-2^4 ]
    Last edited by swensonm; June 21st 2009 at 06:49 PM. Reason: 2^4 not 24
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  2. #2
    Senior Member Stroodle's Avatar
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    There's a rule called BODMAS for order of operations. B=Brackets, D=Division, M=Multiplication, A=Addition, and S=Subtraction. If you do it in this order you'll get the correct answer.

    -2(6)-[3(-7)-2^4]

    =-12-(-21-16)

    =-12-(-37)

    =25
    Last edited by Stroodle; June 21st 2009 at 11:09 PM. Reason: 2^4 not 24 :-)
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  3. #3
    Super Member
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    We call it "PEMDAS" (Parentheses, Exponents, Multiplication, Division, Addition, Subtraction), or "Please Excuse My Dear Aunt Sally."

    Quote Originally Posted by swensonm View Post
    -2(6)-[3(-7)-2^4 ]
    You mean this?
    -2(6) - [3(-7) - 2^4]

    (Hint: learn to use LaTex! )

    If so,
    \begin{aligned}<br />
-2(6) - [3(-7) - 2^4] &= -2(6) - [3(-7) - 16] \\<br />
&= -2(6) - [-21 - 16] \\<br />
&= -2(6) + 37 \\<br />
&= -12 + 37 \\<br />
&= 25<br />
\end{aligned}


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