Question about Casio FX-115ES Scientific Calculator

# Hi, I have a Casio calculator fx-991MS giving me wrong answers!

Hi, I have a Casio calculator fx-991MS and its giving me wrong answers. For example 1/120 my calculator says its 8.3333... but the right answer is 0.0083. How do I fix this?

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• Anonymous Mar 18, 2014

How do I find thhe infinity button my fx 991ms

• Anonymous Mar 18, 2014

How do I find thhe infinity button my fx 991ms

• Anonymous Mar 20, 2014

when I perform a normCDF calculation the answer is always clearly incorrect. For example entering normCDF(-(infinity),16,15,2) gives 0.82467 instead of 0.691

• Scott77 Mar 14, 2017

• Xavier854 May 16, 2017

download the exact same. It is a very easy user interface. you tv player There is a phony app for a you TV application on Google play shop.

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• Casio Master

Hello,
I am only looking for a plausible cause of the error, because I do not believe your calculator can make such a mistake. I think you accidentally activated the Exponential display format and did not pay attention to the small, raised -03 that came at the end of the number displayed. It is a common mistake for those not very familiar with Scientific or exponential notation.

Let us try to reset your calculator to the normal (floating point) format.
Press the [MODE] key a number of times until you reach a screen that has FIX, SCI, NORM and under each one a number (FIX 1, SCI 2), Norm 3). To have the number of decimal place you gave in your result (4 decimal digits), you press 1 to select Fix then 4.

Be aware that scientific calculators usually stop displaying results in floating point format ( 0.0000045 ) if the number is smaller then 0.001. So basically, 0.00099 will be displayed as 9.90-04, -04 being raised above the level, and in smaller size.

Hope it helps.

Posted on Oct 02, 2009

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Posted on Jan 10, 2018

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Posted on Jan 02, 2017

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## Related Questions:

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The answer is correct. It is your understanding of priority of operations that is at fault.
As written your expression is calculated as follows
-2/2600 +10+3.
To ensure that an expression is calculated as you want it, enclose parts of it in parentheses. See the screen capture below.

Nov 26, 2015 | Casio Office Equipment & Supplies

### I have a casio fx-991MS, how do i make a superscript of a number using the calculator

I assume you want an exponent. On this calculator you use the ^ key.

For example, enter 3, enter ^, enter 3, = should give you 27.

Let me know if you have any questions.

Good luck.

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### How to convert decimals into fractions in Casio fx-991MS ...?

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### How to interpolate with 991MS

i am giving the key input with an example..
example-
at 0, value is 300
at 50, value is 270
so how much at 30...

On 991MS,

Enter the values as follows,

0,300 and press M+ key on the calci
(Note: there is a "," in between 0 and 300)

then enter the following,
50,270 and press M+ key

now enter the following input exactly as displayed below:

(30) shift 2 > > > 2 =

you will get the answer as 282.

I hope you got it!!!

LOFT!!!

Feb 22, 2011 | Casio FX-115ES Scientific Calculator

### Casio 991ms model calci display is very dull some

Hi,
The battery may be depleted and needs to be replaced.

Hope it helps.

Nov 16, 2009 | Casio FX-115ES Scientific Calculator

### How to calculate calculus problem by a scientific calculator fx-991ms

Hello,
If by calculus problem you mean derivatives of functions, integrals, extrema and such things, I am sorry to inform you that neither the Casio FX-300MS, nor the FX-991MS can handle them. The newer Casio calculator FX-991ES is capable of performing numerical differentiations and integrations. There also graphing calculators by Casio FX-9750G, FX-9860G as well as by Texas Instruments (TI 83 PLUS/TI84PLUS) that are reasonably performant in that area.

Hope it helps.

Oct 19, 2009 | Casio FX-300MS Calculator

### M mod n in Casio fx991MS

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1, 3 ,4 which is 4*1=4 and 7-4=3 remainder...

Jun 29, 2009 | Casio FX-115MS Plus Calculator

### How to calculate log value in calculator with different base value

In any scientific calculator log2(n) can be  calculated with either ln or log function as follows

Log2(n)= ln(n) / ln(2)

Or
Log2(n)=log(n) / log(2)

both will give nearly the same answers

Dec 08, 2007 | Casio FX-300MS Calculator

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