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CASIO FX-83ES - reset to factory settings

Please could you tell me how to reset this calculator? Back to factory settings?

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  • 11 more comments 
  • Andiec Nov 15, 2007

    oh there is something else wrong other than the settings, as I have re set and it is still not working correctly.

    if i divide 500 by .4 it brings it to a fraction, this is fine as I press S-D but it then turns it into the following answer 8x10to the power of negative 4!!!

    I am looking to convert it back to .0008

    How can I do this?

  • Andiec Nov 15, 2007

    its ok I have fixed my problem, it was due to the amoutn of decimal places I had my calculator set to show, I have set it to 9 so its fine now.

    thanks fir your help

  • shopper07 Nov 24, 2007

    I do not have my instruction book any more. I was wondering if I could get a new one, or a copy of one. I would be really helpful so I can fix my problen which is that I can't divide numbers that don't go into eachother equally. For example 47 divided by 7 comes out to be 47 over 7. An instruction book would be great thanks.

  • Anonymous Nov 30, 2007

    Need to reset decimal on my BA II Plus. Cannot figure it out..

  • Anonymous Dec 03, 2007

    I have this same problem, where the calulator shows me the fraction instead of the decimal number. I tried changing the number of decimal places and it didn't work.

    Any other ideas?

  • kalsoom Jan 02, 2008

    when i try to do division calculations the answer comes up as a fraction but i want to change it to decimal format

  • guest911102 Jan 04, 2008

    no matter what i seem to do all i get is a fraction when dividing and its really important i work this out for my physics exam next week

  • shannonOx Jun 12, 2008

    every time i divide a decimal point it igves me a fraction like for e.g. 250.36 divided by 2 ee 6259 over 50 how can i fix this

  • graciedot Oct 25, 2008

    i have tried all of the solutions posted on here so far and the answers are still coming up as fractions! i'm beginning to tear my hair out, please help! thank you

  • Anonymous Nov 25, 2008

    I have a calculator CASIO fx-9750GA. I want to convert certain decimals into fractions and when I press the d/c button it says "SYN error" I don't know what that is? I tried pressing Shift and then the Set-up button and the first option is Mode and the one below it is Func Type. Across from Mode it says "comp" I don't know how to change from there either. Please help. I rather use the d/c button, why is it not working?

  • Anonymous Dec 15, 2008

    cn someone explain how to reset my calc pls ^^? i dnt hv a button thingy at the bk like my old calc so i dunno how to reset this one. thanks =]

  • Anonymous Apr 28, 2009

    no goodf yoooaa

  • Anonymous May 08, 2009

    THANK YOU!!!!!! +++++++ it worked




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Try removing its batteries first.

Posted on Nov 15, 2007

  • 1 more comment 
  • Rommel Balcita Nov 15, 2007

    if you don't feel like removing the battery then perform this operation!

    SHIFT 9 (CLR) 3 (ALL) = YES

    This will initialize the calculator and return the calculation mode and setup to its initial default setting. this will also clear all data currently in the calculator.

  • gee1996 Jun 07, 2011

    That really worked that you :)

  • sarahbooth69
    sarahbooth69 Jun 12, 2012

    thankyou, another happy customer.



Shift , setup button.. 1 is for fraction, 2 for decimal.

Posted on Aug 23, 2008


Switch it on, press SHIFT button then Mode/Setup button (top right corner) then press 2 to put it in LineIO mode.

Tayeb Kazemi,

Posted on Jan 06, 2008

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