20 Most Recent Casio 12-digit Printing Calculator, Hr-8tm - Page 7 Questions & Answers

I have searched casio and various old manual sites and at this point have found the following manual to be as close to what you are looking for among a multitude of variations. It is not a problem to find a manual to a FX-82C or FX-82AU but the A variation has eluded me: http://casio.edu.monacocorp.co.nz/products/fx82ausplus/pdf/Using_2082AU_20PLUS_20manual.pdf Notice that this comes from a New Zealand site. It makes me wonder if AU might relate to Australia. Only Casio support would know for sure.

Here is a user guide that should prove beneficial. I hope it helps. http://support.casio.com/en/manual/004/fx-300ES_PLUS_EN.pdf

Press SHIFT MODE 8 2 to select the Norm2 display mode.Be aware that the calculator will switch to scientific notation if the magnitude of the number goes above 10^10 or below 10^-9.

http://support.casio.com/pdf/004/fx115MS_991MS_E.pdf copy and paste this address into your browser's address window and download the owner's manual

Casio has most of their calculator and adding machine manuals available here: http://support.casio.com/en/manual/manuallist.php?cid=004 . Select Printing Calculators in the first drop-down menu. Then select the HR-100TM/HR-150TM in the second drop-down menu. Press the Search button. This should get you to the product support page: http://support.casio.com/en/manual/manualfile.php?cid=004016014 . The direct link to the user manual is currently http://support.casio.com/en/manual/004/HR-100TM_HR-150TM_WC_EN.pdf . I hope this helps. Cindy Wells

You can't do that on Casio fx-991es plus calculator. Usually, infinity symbol available in calculators with CAS (Computer Algebra System).

hi meredyth. try this link out. manual for Casio HR 100TM Google Search

Found the manual but nothing about the sound. If I recall sometimes the part that makes the sound can be damaged when replacing the battery, open it up and check the (little wire type vibrating bar) sound bar and adjust if necessary. http://www.casiodigitalwatches.com/manuals/0809.pdf