Laminate flooring packs...???

Discussion in 'Carpenters' Talk' started by macker15, Oct 12, 2006.

  1. really stupid

    really stupid New Member

    When we say

    25 m^2

    we mean

    25 (m^2)

    That is, following the conventional order of operations, we evaluate
    the exponent first, so it applies only to the units. That's different
    from

    (25 m)^2 = 25^2 m^2

    Consider the expression

    5 + 3x^2

    You don't interpret that as (3x)^2, right? Same thing here.

    You have to be careful about where you put the exponent. If you put
    it on the quantity, it means to square the quantity, leaving the units
    alone. If you put it on the units, it means to square the units,
    leaving the quantity alone. If you want to square both, you have to
    use parentheses to extend the scope of the exponent:

    25^2 m = (25*25) (m)

    25 m^2 = (25) (m*m)

    (25 m)^2 = (25*25) (m*m)

    Does this help?

    PS Andy.... that wasnt very nice
     
  2. Mr. Handyandy

    Mr. Handyandy Screwfix Select

    When we say

    25 m^2

    we mean

    25 (m^2)

    That is, following the conventional order of
    operations, we evaluate
    the exponent first, so it applies only to the units.
    That's different
    from

    (25 m)^2 = 25^2 m^2

    Consider the expression

    5 + 3x^2

    You don't interpret that as (3x)^2, right? Same thing
    here.

    You have to be careful about where you put the
    exponent. If you put
    it on the quantity, it means to square the quantity,
    leaving the units
    alone. If you put it on the units, it means to square
    the units,
    leaving the quantity alone. If you want to square
    both, you have to
    use parentheses to extend the scope of the exponent:

    25^2 m = (25*25) (m)

    25 m^2 = (25) (m*m)

    (25 m)^2 = (25*25) (m*m)

    Does this help?

    PS Andy.... that wasnt very nice


    Only a tad less nice than, 'You Twonk!'



    Mr. HandyAndy - really
     
  3. Jonny Round Boy

    Jonny Round Boy New Member

    A sum is any equation that uses multiplication,
    subtraction, division or addition etc.

    So why is the 'sum' of two numbers, always
    multiplied.

    Wrong Andy - a 'sum' has come to be used as a general term, in the same way that all vacuum cleaners can be called 'hoovers'. It's moved into general use, as a catch-all, but strictly speaking that is wrong.

    In pure scientific terms, a sum is an addition. Not a multiplication, division, or anything else. The sum of 10 and 10 is 20, not anything else.

    And 2m2 is two square metres, NOT 2 metres squared.
     
  4. really stupid

    really stupid New Member

    so did the explanation help then
     
  5. really stupid

    really stupid New Member

    as mr circle has just re-iterated... putting the exponent on the units means that you are expressing an area of 5x5
     
  6. russ295

    russ295 New Member

    just to add another spanner in the work...

    4m x 4m = 16m2

    the square root of 16m = 4m.

    when i buy an 8 x 4 sheet, thats what i get, i dont ask for a 32 ft2 board. but if i did it may come

    5.6568542494923801952067548968388 ft
    by
    5.6568542494923801952067548968388 ft
     
  7. hab

    hab New Member

    Wow, it's really getting confusing now but there is a serious mistake being made in this thread about the meaning of the word "square" when used in the mathematical sense - it just means to multiply the number in question by itself.You can't multiply anything other than a number by itself - you can't square a unit for example.The words "squared" and "multiply", commonly defined, only apply to numbers and not to anything else.
    The term m2 is really a rather unfortunate but internationally recognised way of abbreviating "square metre" and it should not be taken in any way as squaring a metre or applying the exponent 2 to a metre - both are meaningless concepts.
    Let me apologise to all who think this is getting too mathematical but in my experience this whole matter causes untold confusion even amongst those who think they understand it.
    Regards,and apologies, Hab
     
  8. audi-evo

    audi-evo Active Member

    "The term m2 is really a rather unfortunate but internationally recognised way of abbreviating "square metre"
    exactly, this is my point, i am not telling people what is mathermatically correct just that m2 is a widely used abbreviation for square metre.
     
  9. hab

    hab New Member

    Audi-Evo, we are in complete agreement.Your arguments have been entirely correct throughout this thread.
    Of course all this sort of confusion would not have happened if those who decide on the abbreviations used for units internationally had decided to do what has been done in other fields ( sorry for the horrible pun coming up!) - the unit of area in farming is the hectare or acre.The unit of force is the Newton and electricians have their volts,watts and ohms;even plumbers have bars and pascals.Unfortunately most trades are stuck with "m2".I hesitate to ask this, but can anyone come up with a new and proper name for the metric unit of area?
    Best regards, Hab
     
  10. audi-evo

    audi-evo Active Member

    I think this unit should be called "the Andy" and you could have a pocket sized electronic ready reconer to work it all out.
    We could call this the "handy andy
     
  11. Mr. Handyandy

    Mr. Handyandy Screwfix Select

    Very good evo.


    As I've already said, I think it should be sq.m

    Does what it says on the tin.


    The confusion comes when 4² means 4 squared, but m² doesn't mean metres squared.

    Otherwise 4² would mean square 4(I was going to put these descriptions in parentheses,(' ") but it may have looked like inches or feet)


    Damn abbreviations.


    LMAO anyway. :):D


    Mr. HandyAndy - really
     
  12. dirtydeeds

    dirtydeeds New Member

    what on earth is wrong with you people

    m = metres
    m2 = metres x metres (the 2 tells you what, and that its an area)
    m3 = metre x metres x metres (the 3 tells you what to do and that its cubic metres)
     
  13. dirtydeeds

    dirtydeeds New Member

    are you fik or something
     
  14. Jonny Round Boy

    Jonny Round Boy New Member

    what on earth is wrong with you people


    There's nothing wrong with most of us, it's just Handy that wants to argue... ;)
     
  15. bondy

    bondy New Member

    wotalodofukinshit
     
  16. really stupid

    really stupid New Member

    the term m^2 is not incorrect it is doing what some of you have said and dismissed... ie it is squaring the units, or in other words it is telling you that 100m^2 is an area of 100 derived from a number of m x a number of m, it could be 20m x 5m or 10 x 10
     
  17. audi-evo

    audi-evo Active Member

    btard bstard bstard, we have had 3 days free of this and you have to dig it up again!!!!!!!!!!!!!!!!
    SQUARE METERS, ROUND METRES OR GAS METRES
    I DONT CARE ANY MORE!!!!!!!
    admin please delete all records of this post and flash that thing off men in black at everyone so they forget all about it!!!!!!!!!!!!!
     
  18. really stupid

    really stupid New Member

    forget about what?
     
  19. really stupid

    really stupid New Member

    lets talk about nitros consumer unit instead !
     
  20. audi-evo

    audi-evo Active Member

    ok consumer units thats better, as everyone knows these can be fitted by anyone at all and without any qualifications whatsoever.
    Part P has been abolished and electrical work has been deemed a free for all.

    WHAT....WHAT....WHAT DID I SAY?
     

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