Question about Casio Advanced Scientific Calculator with 2-Line Natural Textbook Display FX-115ES

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How do i charge my casio calculator

It is a casio fx-991ES natural display...with a solar cell ..how do icharge it because the weather here is not producing any sun

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SOURCE: mode change

Hello,
Just so that we know what we are talking about. The natural display is the display mode in which fractions appear on two lines, radicals appear as radicals, log can be calculated in any base, etc. If that is what you understand by Natural Display, we are in agreement.
To set this mode, you turn calculator ON and press [SHIFT][MODE] (setup). The option is called MathIO, and it has the number 1.
Thus [SHIFT][MODE][1:MathIO].
Hope it helps.

Posted on Oct 13, 2009

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SOURCE: my casio calculator is giving answers always in fraction form. I need to get the answers in decimal form (my calculator is fx-991ES)

To convert a single answer from symbolic to decimal, press the S--D key (just above the DEL key). To have all answers come out in decimal format, press SHIFT MODE 2 to switch to the LineIO mode.

Posted on Aug 04, 2012

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SOURCE: How to calculate Modular inversion on My Casio

Your calculator cannot perform inverse modulo calculations. To calculate yourself ( with pen and paper) you should consult a book on algebra.

Posted on Aug 22, 2012

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I've got a casio fx 991plus calculator and I want to know how to use feet and inches in the calculation displays, like how is used meters and centimetres in the display


PDF]fx-570MS/991MS Additional Functions - Support - Casio

support.casio.com/pdf/004/fx570MS_991MS_E.pdf

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 .

The Casio fx-991es, fx-570es and - Numericana

www.numericana.com/answer/casio.htm
The Casio fx-991ex succeeds the fx-991es (functionally identical to the ... Both are nonprogrammable nongraphing scientific calculators, with natural ... Side-by-side comparison of the fx-991EX and fx-991ES PLUS. ... Displays QR codes for smartphone use .... Work out a formula for many values of the input variables.

CASIO fx-991MS Calculator Tutorial: Lesson 5- Dealing with ...


Dec 03, 2015 | Casio Office Equipment & Supplies

2 Answers

I use casiofx-991ES,its numbers looking upside down.How can i fix it?


I had the same problem with my casio fx-991ES calculator, i tried initializing the calculator by keying in shift9(CLR)3(all)=(yes) but that didn't fix the display,so i opened the calculator and removed the battery for about 5days then put the battery back guess what the display started operating well! no more inverted display or numbers.if initializing the calculator does not fix the problem,take out the battery for some few days then put it back in that should fix the problem.cheers

Sep 27, 2013 | Casio Fx-991es Scientific Calculator

3 Answers

My casio calculator is giving answers always in fraction form. I need to get the answers in decimal form (my calculator is fx-991ES)


To convert a single answer from symbolic to decimal, press the S--D key (just above the DEL key). To have all answers come out in decimal format, press SHIFT MODE 2 to switch to the LineIO mode.

Aug 04, 2012 | Casio Brand New-Fx-991es Plus - Scientific...

1 Answer

My daughter is starting 6th grade and they have asked her to get a T1-30XA or TI-83/TI-84, she is not advanced in math. Which on would you recommend ?


The Ti83/84PLUS are a lot more advanced than the TI-30XA because thaeu can graphs, statistics, calculus etc. But they lack a key for the % function, and a key for the fraction manipulation, the angle unit conversions (deg, radians, et grads) and they are a lot more expensive than the TI30XA.

Before your daughter finishes high school, you will eventually have to buy her a graphing calculator but right now a TI83/84Plus calculator seems like overkill. Besides some teachers may not let students have graphing calculators during exams.

Honestly I suggest you buy the TI-30XA Solar version. There are some new nifty calculators manufactured by Casio (Casio FX-115ES, FX-991ES, FX-300ES), Sharp (El-506W, 516W ). The beautiful thing about these new kinds of calculators is that you can configure them to use the Textbook display: equations and expressions can be entered as they would appear in textbooks. The Casios are called Natural Display and the Sharps are know as WriteView models.
In fairness to Texas Instruments, they too have calculators that incorporate that display format but I do not know the exact model numbers (maybe TI34XII multiview).

Aug 20, 2010 | Texas Instruments TI-30XA Calculator

1 Answer

What calculator would you recommend for polar and rectangular formula's?


Are you serious?
No calculator purchase should be solely based on such a trivial matter.
But if you are looking for a very good scientific calculator, I would suggest the new Write View EL-W506/W516/W546 calculators by Sharp, or the FX-115ES/991ES Natural Display by Casio.

With these calculators you can see what you enter displayed as in textbooks. Naturally, they all do coordinates conversions from Polar to Rectangular and from Rectangular to Polar.

Jun 17, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

Mode change


Hello,
Just so that we know what we are talking about. The natural display is the display mode in which fractions appear on two lines, radicals appear as radicals, log can be calculated in any base, etc. If that is what you understand by Natural Display, we are in agreement.
To set this mode, you turn calculator ON and press [SHIFT][MODE] (setup). The option is called MathIO, and it has the number 1.
Thus [SHIFT][MODE][1:MathIO].
Hope it helps.

Oct 13, 2009 | Casio FX-115ES Scientific Calculator

1 Answer

Can I simplify radaicals with the Casio FX-300MS?


Hello,
This calculator transforms every radical into a decimal number. It does not perform exact calculations with radicals. For that you would need a Casio FX-115ES or FX-991ES (Natural Display).
Hope it helps.

May 13, 2009 | Casio FX-300MS Calculator

1 Answer

I have to buy Casio FX-991W Plus. No one has it. I checked eBay and the Casio web-site. I need that one. where can I get it from?


Hi,
If you cannot find it, buy an FX-991ES. It is solar-powerd and it has the natural text-book display, which is a novelty in calculators.
I know that Staples carry the FX-991ES.

Hope it helps.

Nov 27, 2008 | Casio FX-115W Plus Calculator

1 Answer

Casio FX-300MS - Simplifying Radicals


Hello,
Sorry the calculator handles fractions but not radicals. You may be interested in the newer Casios FX-115ES, or FX-991ES, (Natural display).
It handles a lof more that radical and fractions.
Hope it helps.

May 28, 2008 | Casio FX-300MS Calculator

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