CasioManuals are available for free on our website by selecting one of the links below. If you need a manual to be printed and mailed to you please call ...
LR54x1 is not the the model number of your calculator. It is the reference of the button battery you calculator uses.
Check your number model and then go to Casio support page http://www.casio.com/support/manuals/, click on "Calculators", agree to the Terms and Conditions, and look for your calculator.
If your calculator isn't listed, download the manual for the SL-450L under Standard Calculator. It will probably be suitable for your calculator too.
Also read the FAQS for Casio calculators
This page contains 2 manuals for FX115 calculators, and while the standard seems to be MS, each manual includes several models. This should address what you need. http://www.retrevo.com/s/Casio-fx-115MS-Calculators-review-manual/id/467ci265/t/1-2/
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