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  1.    #1  
    Anyone try to use their calculator? yes it appears to work..... then throw a wrench in have it do something like this, 160,000 minus 3% i get 1,599.9 hehe i dont know what math its using but damn somehow i doubt thats correct being that 3% of 160,000 is 4,800. amaze your friends and family fight with spouses swearing up and down that your "calculator" is correct!!!!!


    Ok seriously anyone have a fix?
  2. #2  
    It's the same alternate math that P1 was using to estimate our shipping times.

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  3. aldamon's Avatar
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    #3  
    OMG. That's hilarious!

    1,599.97.

    I'm pretty sure it's right though is some way. It's just calculating 3% as 0.03. Wait, that's not right.
  4. #4  
    160,000 minus 3% is 159,999.97 (ie 160,000 - 0.03 = 159,999.97) and is not the same as 3% of 160,000.

    I don't have a Treo 650 yet to try your experiment, check the decimal place for that answer. There hasn't been a major math bug in a processor since the original Pentium.
  5. Rob
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    #5  
    User math bug
  6. #6  
    Quote Originally Posted by GoodHw
    160,000 minus 3% is 159,999.97 (ie 160,000 - 0.03 = 159,999.97) and is not the same as 3% of 160,000.
    160,000 - 3% = x
    160,000 - 4,800 = x
    155,200 = x

    I'm assuming you meant to say 160,000 minus 3% is 155,200.

    This work fine on my T3.

    It looks like the 650 is not calculating the percentage and has a decimal placement issue on top of that.
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    #7  
    you guys have too muh free time http://www.rage3d.com/board/images/smilies/nuts.gif
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  8. #8  
    It looks like the Treo is getting its order of operations messed up. It looks like it is doing this:

    (160,000 - 3)%
  9. #9  
    It works in finance mode if you say: 160,000 - % 3 =

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  10. #10  
    Syntaxtically, I have a problem with the expression:

    160,000 - 3%

    My question is "3% of what?"

    Mathematically speaking, 3%=0.03. So 160000-0.03 = 159999.97.

    But if you mean 3% of 160000 then that should have been written as:

    160000-3%(160000)

    Perhaps in some calculator world, 160000-3% is an acceptable shorthand for x-3%x ? Any how, I always crinch whenever I see such abbreviation. I always like Reverse Polish Notation because it promotes good notation.
  11. #11  
    what it is doing is taking 160,000-3, which is 159,997.

    all the percent button does is divide by 100. so 159,997/100 is 1,599.97
  12. #12  
    Here is what actually happened:

    You entered: 160000 - 3 %

    What the Treo did:
    160000 - 3 = 159997 (then it processed %)
    % turns 159997 into a percentage based on 100 = 1599.97 (moving the decimal place to the left 2 places)

    Try this, and you'll see what it's doing:
    Enter: 160000 - 3 =
    Treo Displays: 159,997
    Enter: %
    Treo Displays: 1,599.97

    It's not an error on the Treo's part. You simply can't enter the calculation in that way.

    To see 3% of 160,000 you need to enter: 160000 * 3 %
    Treo displays: 4,800

    To do your original calculation, you need to do it in two parts:

    Enter: 160000 * 3 % M+
    Treo displays: 4,800
    Enter: 160000 - MR =
    Treo displays: 155,200
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  13. #13  
    dethman's Palm's interpretation of the % function seems to make the most sense. I've got a Texas Instruments TI-1795SV calculator ($12 big digit model) at my desk and when I press [1],[6],[0],[0],[0],[0],[-],[3],[%],[=] I get -4,800. So as you can see, the same interpretation problem we are having in the language also shows up in each company's interpretation of their calculator software. Isn't English great. =)
  14. #14  
    Quote Originally Posted by soulreaver99
    you guys have too muh free time
    Don't under estimate this kind of problem. If the Intel XScale processor had a math problem and you happened to be hooked up to an automated intravenous medicine despenser running on one of these processors you might have a bad day.
  15. #15  
    Quote Originally Posted by GoodHw
    dethman's Palm's interpretation of the % function seems to make the most sense.
    Nobody ever listens to me....
  16. #16  
    This works how you're expecting it to work in windows calculator.. I agree that's its a pretty weird expression and I wouldn't trust any calculator to handle it correctly (even if the occasional one does)..

    On a sidenote, buying a house? That sounds like a how much is my loan gonna be if I put down 3% calculation.
  17. #17  
    Quote Originally Posted by unclejung
    Syntaxtically, I have a problem with the expression:

    160,000 - 3%

    My question is "3% of what?"

    Mathematically speaking, 3%=0.03. So 160000-0.03 = 159999.97.

    But if you mean 3% of 160000 then that should have been written as:

    160000-3%(160000)

    Perhaps in some calculator world, 160000-3% is an acceptable shorthand for x-3%x ? Any how, I always crinch whenever I see such abbreviation. I always like Reverse Polish Notation because it promotes good notation.
    This makes sense and yes mathematically I think there is only one correct way of expressing what one wants to calculate. In the example used in the original post, that missing 'what' of 3% of 'what' is the problem and the Treo's interpretation of 160000 - 3% is correct if it first subtracts 3 from 160000 and then simply divides it by a 100 to express it in %
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  18.    #18  
    Quote Originally Posted by Joebar
    This works how you're expecting it to work in windows calculator.. I agree that's its a pretty weird expression and I wouldn't trust any calculator to handle it correctly (even if the occasional one does)..

    On a sidenote, buying a house? That sounds like a how much is my loan gonna be if I put down 3% calculation.
    ya you got me was just trying to play with some numbers, and got hopes up "not good with math" when i saw 1500 being 3% haha my wife is like no its not that i was like hey calculators dont lie! then she proved me wrong heh. Damn woman always gotta be right!
  19. #19  
    http://discussion.treocentral.com/im...es/biggrin.gif I knew it..... Dealt with it all myself a little over a year ago. Wish the numbers were 160,000 on Long Island though.. ouch!
  20. #20  
    In many simple calculators the % key is short for "/ 100". This is not so unusual. What you did is 160,000 - 3/100 which is 1,599.97.

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