Question about Casio FX-115ES Scientific Calculator

Press the RCL button followed by the letter where you stored some value.

Posted on Aug 27, 2014

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Posted on Jan 02, 2017

SOURCE: 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

Posted on Apr 24, 2009

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

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

Testimonial: *"Thanks so much, its working now:) I thought I was going to have to buy a new calculator!"*

SOURCE: how to remove memory sign

Overwrite the M memory with zero, by using 0 STO M

ie store 0 into memory M by pressing AC 0 SHIFT RCL M+ (as per keys actually pressed)

Posted on Jun 30, 2011

SOURCE: to chang fx-991ms to fx-82ms calculator

I am afraid but your question does not make sense to me. These are are two different calculators. What do you mean by change? Is it the same as in fairy tales where a prince is changed into a frog?

Posted on Apr 13, 2012

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

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

You cannot store any formulas. The device has only read only memory. You cannot add to this memory.

Sep 11, 2015 | Office Equipment & Supplies

On a fx-991MS? With many other models, including the fx-991ES, I'd say you have the calculator in binary mode but the 991MS doesn't have such a mode.

Aug 03, 2013 | Office Equipment & Supplies

Do you mean the fx-991ES?http://upload.wikimedia.org/wikipedia/commons/8/8f/Casio_fx-991ES_Calculator_New.jpg

Or do you mean the fx-991MS?http://nayuki.eigenstate.org/res/casio-fx-991ms-tips-and-tricks/casio-fx-991ms-l33tness.jpg

Or do you mean the fx-991MS?http://nayuki.eigenstate.org/res/casio-fx-991ms-tips-and-tricks/casio-fx-991ms-l33tness.jpg

Jul 25, 2013 | Cameras

Overwrite the M memory with zero, by using 0 STO M

ie store 0 into memory M by pressing AC 0 SHIFT RCL M+ (as per keys actually pressed)

ie store 0 into memory M by pressing AC 0 SHIFT RCL M+ (as per keys actually pressed)

Jun 27, 2011 | Casio FX991MS Scientific Calculator

Your calculator knows only the decimal logarithms log or log_10 and the natural logarithms (ln or log in base e).

So you cannot compute directly the logarithms in any bases other than 10 and e.

A workaround consists in using the relation

log in base b of a number a (log_b (a))

log_b(a)= (log_10(a) ) / (log_10 (b))

or the relation

log_b(a)= ln(a)/ln(b)

log_2(0.3)=log(0.3)/log(2) where log is log in base 10

Similarly

log_2(0.3)=ln(0.3)/ln(2)

As to the multiplicative factor you had at the beginning of your expression, just multiply the value obtained by one on the formulas above (both formulas will give the same result) by 0.3

So you cannot compute directly the logarithms in any bases other than 10 and e.

A workaround consists in using the relation

log in base b of a number a (log_b (a))

log_b(a)= (log_10(a) ) / (log_10 (b))

or the relation

log_b(a)= ln(a)/ln(b)

log_2(0.3)=log(0.3)/log(2) where log is log in base 10

Similarly

log_2(0.3)=ln(0.3)/ln(2)

As to the multiplicative factor you had at the beginning of your expression, just multiply the value obtained by one on the formulas above (both formulas will give the same result) by 0.3

Jul 18, 2010 | Casio FX-115ES Scientific Calculator

how to solve probability in fx-991ms

Mar 10, 2010 | Texas Instruments TI-84 Plus 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

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