Question about Casio FX-115ES Scientific Calculator

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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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

Casiodisplay format (Disp) settings while the calculator is in the BASE ... Be sure to checkthe current calculation mode (SD, REG,. COMP ... Use [ and ] to display the expression 4 + 4. Press A ... want to perform scientific function calculations. COMP .

Dec 03, 2015 | Casio Office Equipment & Supplies

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.

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 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.

Paul

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

Let me know if you have any questions.

Good luck.

Paul

Sep 30, 2015 | Casio Office Equipment & Supplies

Read user's manual. Don't have one? Download it from here:

http://support.casio.com/storage/es/manual/pdf/ES/004/fx100MS_115MS_570MS_991MS_ES.pdf

http://ftp.casio.co.jp/pub/world_manual/edu/en/fx115MS_991MS_E.pdf

http://ftp.casio.co.jp/pub/world_manual/edu/es/fx115MS_991MS_S.pdf

Tutorial para calculadora CASIO fx 991MS

http://support.casio.com/storage/es/manual/pdf/ES/004/fx100MS_115MS_570MS_991MS_ES.pdf

http://ftp.casio.co.jp/pub/world_manual/edu/en/fx115MS_991MS_E.pdf

http://ftp.casio.co.jp/pub/world_manual/edu/es/fx115MS_991MS_S.pdf

Tutorial para calculadora CASIO fx 991MS

Sep 12, 2015 | Casio Office Equipment & Supplies

When the calculator (in this case Casio fx....) Look for the "a b/c" button on the key pad. For example 1.5 becomes 3/2 or 1 1/2

Nov 24, 2013 | Office Equipment & Supplies

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,

Go in Reg mode, for doing that : press Menu,Menu, 2

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!!!

example-

at 0, value is 300

at 50, value is 270

so how much at 30...

On 991MS,

Go in Reg mode, for doing that : press Menu,Menu, 2

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

Hi,

The battery may be depleted and needs to be replaced.

Hope it helps.

The battery may be depleted and needs to be replaced.

Hope it helps.

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

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.

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

there is one button ab/c beneath CALC... if u want to calculate 7 mod 4 then... u should press 7 then ab/c 4 and equal to

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

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

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

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

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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