PEMDAS

Discussion in 'Secondary Education' started by Michelle, Aug 2, 2019.

  1. Michelle

    Michelle Rookie

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    Aug 2, 2019

    8 ➗ 2 ( 2 ➕ 2 )

    If solved correctly following the order of operations the answer should be 16. Correct?
    Or are the math teachers I work with doing it wrong ?
     
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  3. Tired Teacher

    Tired Teacher Companion

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    Aug 2, 2019

    It looks like 16 to me too, but I only teach 3rd grade. lol
     
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  4. Michelle

    Michelle Rookie

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    Yes I agree. But there are people arguing that 2(4) is not the same as 2x4 lol
     
  5. Tired Teacher

    Tired Teacher Companion

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    Hmmm... I should probably not be going down this road. lol After taking our state math test, I saw a group of coach- looking male teachers standing around chatting about how difficult 1 math problem had been. I remembered the problem and thought, "Wow! That was a simple 1 for them to have had such a hard time." On my ride home, feeling a bit smug, I realized it had been a really tricky problem I had missed a few steps of it. :)
     
  6. TeacherGroupie

    TeacherGroupie Moderator

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    My goodness. What answer(s) are you being given?
     
  7. futuremathsprof

    futuremathsprof Aficionado

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    Aug 2, 2019

    Insert grouping symbols; specifically, parentheses:

    8/[2(2+2)] = 1

    Gotta the love the American educational system...
     
  8. futuremathsprof

    futuremathsprof Aficionado

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    ...
     
    Last edited: Aug 2, 2019
  9. futuremathsprof

    futuremathsprof Aficionado

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    Aug 2, 2019

    The math teachers you are working with don’t know their subject matter well enough...
     
  10. vickilyn

    vickilyn Magnifico

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    I think that some of the confusion is that the (divided by) sign very much resembles the + sign in the first post. Clean up those two images and it will give you the correct answer.
     
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  11. Tired Teacher

    Tired Teacher Companion

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    Vickilyn, I wish that had been my problem, but that might be the problem for some.. :)
     
  12. a2z

    a2z Maven

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    .................................
     
  13. Tired Teacher

    Tired Teacher Companion

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    a2z, I am still trying to figure that out....lol
     
  14. futuremathsprof

    futuremathsprof Aficionado

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    a2z clarified their original post and I retract my previous statement.
     
    Last edited: Aug 2, 2019
  15. futuremathsprof

    futuremathsprof Aficionado

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    Nope. It’s pretty obvious. You don’t need multiple math degrees like I have to see this.
     
  16. a2z

    a2z Maven

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    Aug 2, 2019

    Would you elaborate why you add additional groupings for those who don't know? Since the American educational system doesn't teach it correctly, please explain.

    8 ➗ 2 ( 2 ➕ 2 )

    Students are typically taught to do what is in the parenthesis first.
    8 ➗ 2 ( 4 )
    Then to do multiplication or division from left to right.
    4(4)
    16

    Please explain to those who do not know why the additional grouping rather than treating the 2(4) like it is written 2 x 4. PEMDAS does not explain that. The American math curriculum does not teach that.
     
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