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Math Help - Order of Operations

  1. #1
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    Order of Operations

    Hi Everyone,
    I really could use your help with this problem. For some reason it's not making sense to me. I'm sure once I see how it is done I will realize how easy it is.

    (9^2-2)-(9-9^2-8)

    I know the answer is 159, but I can't figure it out.

    Thanks for any help
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  2. #2
    Senior Member Stroodle's Avatar
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    (9^2-2)-(9-9^2-8)

    = 9^2-2-9-(-)9^2-(-)8

    = 9^2-2-9+9^2+8

    = 81-11+81+8

    = 159
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  3. #3
    MHF Contributor
    skeeter's Avatar
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    Quote Originally Posted by bluecat View Post
    hi everyone,
    i really could use your help with this problem. For some reason it's not making sense to me. I'm sure once i see how it is done i will realize how easy it is.

    (9^2-2)-(9-9^2-8)

    i know the answer is 159, but i can't figure it out.

    Thanks for any help
    (9^2-2)-(9-9^2-8)

    (81-2)-(9-81-8)

    (79) - (-80)

    79+80

    159
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  4. #4
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    Thanks so much for helping me out.
    I see now where I got stuck...(79)-(-80)

    I totally forgot to "Draw the line and change the sign"

    Thank you very much
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