Question about HP Office Equipment & Supplies
I have the above calculator and would like to use it, but I don't have the manual and don't know what type of batteries to buy. Could you tell me the type and voltage? I know there are three of them.
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
There are plenty of casio 991 manuals here. Take your pick!
Dom't forget to leave feedback if it solves your problem. 'fixya'!
Posted on May 01, 2008
1. To convert a number to scientific equation, use [2nd][Sci]
Exemples 12345 [=] screen shows 12345 Then [2nd][Sci] coverts it to 1.2345 ^04 to the power 4.
2. To enter directly a number in scientific notation (e.g. -1.2345 X10^(-65) a very small number) you use the [EE] key 1.2345[+ /-][EE][+/-]65 shows as -1.2345 -65
1.6X10^(-19) 1.6[EE][+/-]19 shows as 1.6 -19
Hope it helps
Posted on Sep 17, 2009
Sorry to disappoint you: This calculator is not programmable.
Posted on Nov 30, 2009
Testimonial: "Very much appreciated, quick response etc. "
Tips for a great answer:
Nov 30, 2015 | HP 32Sii Scientific Calculator
Aug 04, 2014 | HP 20S Scientific Calculator
Aug 28, 2010 | HP 20s Calculator
Aug 25, 2010 | HP 10s Scientific Calculator
Aug 13, 2010 | Texas Instruments TI-30XA Calculator
Jun 08, 2010 | Casio FX-115ES Scientific Calculator
Aug 24, 2009 | HP 12c Calculator
Oct 10, 2008 | HP 8S Scientific Calculator
99 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: