Can you solve 8÷2(2+2)?

Discussion in 'Other News' started by Chinatown, Aug 1, 2019.

  1. x1Heavy

    x1Heavy Road Train Member

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    The first half of the problem

    8\2 = 4

    Now for the second half

    ( ) Means that whatever is inside that you do.

    (2+2) = 4

    Now take the left answer and divide against the right answer = 1

    If math people put in more equations, then you work left to right solving each group.

    Just like axeling a big rig savvy?
     
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  3. laaylor

    laaylor Road Train Member

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  4. gentleroger

    gentleroger Road Train Member

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    All common core math means is showing your work and that all students of a certain grade should have mastered certain skills.


    Not exactly - it would be 8 x 20 x40 -10.

    These "only geniuses can solve" arithmetic problems are not hard problems, they are poorly written problems that intentionally lead to multiple answers.
     
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  5. MartinFromBC

    MartinFromBC Road Train Member

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    ????????????????????????
     
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  6. x1Heavy

    x1Heavy Road Train Member

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    I'll take a stab at answering the problem.

    In America school educators at the Board Level and State Levels around the time of 9-11 was not satisfied with students writing down say


    24
    +50
    _____

    74 done.

    Oh no.

    This is what Common Core wants new students to do

    24
    50

    You work your way vertically
    Then you come back up the tree subtracting as you go
    Then you fiddle with the numbers around and to the side bar in a certain way

    The result is a student scratching out about 6 lines of paper to come up with 74.

    Basically puffed up BS make work crap.

    I would burn down any school that teaches that crap. 3000 years of Arabic Number System and today's educators muck it all up.
     
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  7. DUNE-T

    DUNE-T Road Train Member

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  8. gentleroger

    gentleroger Road Train Member

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  9. Dave_in_AZ

    Dave_in_AZ Road Train Member

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    Not exactly - it would be 8 x 20 x 40 - 30
     
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  10. lilillill

    lilillill Sarcasm... it's not just for breakfast

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    It's not 2^4, it's 2x4 and the answer is 16 because of missing parentheses.

    Simplify first...

    8/2(2+2)
    8/2(4) which is the same as: 8/2*4

    Left to right

    8/2*4
    4*4
    16

    If it was

    8/(2(2+2)) the answer is:

    8/(2(2+2))
    8/(2(4))
    8/8
    1
     
  11. Dave_in_AZ

    Dave_in_AZ Road Train Member

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    No. No NASA projects for you.

    Laws of mathematics - Anything in brackets. Then you solve for exponents ( the number in the bracket ).
     
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