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Let us touch off a fire storm

Discussion in 'Random Discussion' started by valis, Aug 14, 2019.

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  1. valis

    valis Moderator Thread Starter

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    Anyone?

    8/2(2+2)

    I solve and get 'buick' but my math may be off.

    Curious as to the answers.
     
  2. lochlomonder

    lochlomonder

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    I know this is driving people nuts, valis :D

    I would argue the answer is 1, using the BODMAS acronym we were taught at school, i.e. Brackets Out, Divide, Multiply, Add, Subtract.

    Accordingly 8/2(2+2)
    = 8/2(4)
    = 8/8
    =1
     
    valis likes this.
  3. Johnny b

    Johnny b

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    Using the math I learned about 65 years ago...... 1

    :D

    But things change.

    Here's one I heard while in a university calculus class I'll never forget.
    One of the students ( not me :D ) argued that multiplying by 1/2 was not the same as dividing by 2.
    The prof didn't find it very funny :D
     
  4. valis

    valis Moderator Thread Starter

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    And on this side of the pond, we use PEMDAS...Which returns 16...;)

    This crap is why I was an English major...
     
  5. Johnny b

    Johnny b

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    Sorry, I don't see it.
    Could you go step by step for an explanation ( beyond an acronym)
     
  6. valis

    valis Moderator Thread Starter

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    Parentheses first, then ecponents, muliplication, division, addition, subtraction. PEMDAS.

    So 8/2(2+2)
    8/2(4)
    4(4)
    16
     
  7. valis

    valis Moderator Thread Starter

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    There is a member here whom I grew up with, and is arguably one of the smartest humans I have met, and he returned 16 as well....as did my son.

    Whom, by the way, started high school today. Holy crap.
     
  8. Johnny b

    Johnny b

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    8/2(2+2)
    8/2(4)
    OK
    But it's 8 divided by the sum of 2 times (2+2)

    New math :rolleyes: :D


    And yeah, I found links to substantiate your answer, and I found links to substantiate mine.

    It depends upon changing the meaning of the ( )

    http://www.math.harvard.edu/~knill/pedagogy/ambiguity/index.html
     
  9. Johnny b

    Johnny b

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    I was never taught PEDMAS or BODMAS.

    Just math LOL!
     
  10. valis

    valis Moderator Thread Starter

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    It bugs me greatly that there are multiple correct answers for this, depending on what one was taught. Math is math; 2 and 2 should ALWAYS equal 4.
     
  11. Johnny b

    Johnny b

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    To get '16'

    I would write it:

    edit: on second thought (8/2) * (2+2)

    It separates functions to be carried out independently.

    Does this bother me?
    No.
    It's not an issue of 2 correct answers, it's an issue of divergent definitions of how functions are displayed.
     
    Last edited: Aug 14, 2019
  12. Johnny b

    Johnny b

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    1 divided by 1/2 = 1 * 2

    :D

    Just math.
     
  13. Couriant

    Couriant Trusted Advisor

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    I hate seeing this in my FB feed... lol
     
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  14. valis

    valis Moderator Thread Starter

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    8/2 " (2+2) is redundant. It is the same as the original statement, the " is unneccessary.
     
  15. Johnny b

    Johnny b

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    For you it is, for me it isn't.
    Note, I edited the formula just before you posted.

    8/2(2+2) in my world, is 8 divided by the sum of 2 *( 2+2)

    In your's....well.... :D
     
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