# 20 Most Recent Casio Fx-992s Scientific Calculator - Page 6 Questions & Answers

If the i8ntegral is difficult to calculate, it may take a long time. During the calculation, the machine is busy and does not answer.

Casio Office... | Answered on May 21, 2018

The print head needs cleaning. Use a cotton swab and alcohol to clean it.

Casio Office... | Answered on May 05, 2018

Just as you do it by hand. To input X press Alpha key then ).
The question I ask is what do you want to do? The = sign is a problem. If you do not have a second = sign (Shift =) then the calculator cannot handle the problem you want to solve.

Casio Office... | Answered on May 01, 2018

Press the S-D button to switch between fractions and decimals.

Casio Office... | Answered on May 01, 2018

I've hunted and hunted for you but it looks like a "Repair Center" item?

Start here:

https://www.casio.com/support/authorized-service

Authorized Service and Support-Service Centers
Primary Warranty Authorized Service Centers (U.S.A.) For Musical Instruments (Models AL, AP, PX, WK only), please go here.

### East Coast Service Location

Casio Factory Service Center(Opens the Casio Factory Service Center website in new window)(Opens the website in new window)

### West Coast Service Location

The Time Machine
2335 Honolulu Avenue
Suite B
Montrose, CA 91020
Phone: 818-249-6007
Fax: 818-249-9412

Casio Office... | Answered on Apr 16, 2018

First solve the problem by hand. Once you understand the solution it would be easier for you to implement it.

Casio Office... | Answered on Apr 08, 2018

When it is time for you to put an expression in absolute value, press the OPTN key, then F5/Num, then F1/Abs. Open parenthesis, input expression, then close parenthesis.
For fractions, use the key with the symbol a b/c.
A little friendly advice, please do invest some of your time reading the manual. Most Casio graphing calculators work the same way. What you learn on one, works on another.

Casio Office... | Answered on Apr 08, 2018

With a number displayed, pressing the M+ key adds the displayed number to the contents of the running memory, and stores the result. Pressing the M- key subtracts the displayed number from the memory and stores the result in the running memory.

Casio Office... | Answered on Apr 08, 2018

Choose the computational mode as Standard Deviation or Statistics, Enter your values and press the keys x_bar or other to get the measures you are looking for.

Casio Office... | Answered on Apr 08, 2018

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