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I have a Casio fx 991ES and I'd like to have my answers in surd form instead of decimals how is that possible

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  • Office Equip... Master
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Select the Math input/output mode by pressing SHIFT [SETUP] 1.

[SETUP] is the shifted function of the MODE key, located just right of the round cursor pad.

Posted on Jan 01, 2014

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Posted on Jan 02, 2017

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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

bburton519
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SOURCE: on my casio fx-82au plus calculator it won't

I have a casio fx-82Au calculator.
When I do a square root equation it gives me a decimal answer.
How do i get it to show as a surd
I have tried using the button s<>d and it is not working. Please help!!

Posted on Oct 21, 2013

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1 Answer

Answers in log or ln form?


This is a good scientific calculator that can do a lot, but things in the realm of a CAS (Computer Algebra System) are beyond its capabilities.

Apr 23, 2014 | Casio Brand New-Fx-991es Plus - Scientific...

4 Answers

On my casio fx-82au plus calculator it won't


The capability of these calculators to handle irrational numbers in radical form is limited to square roots. Roots of index other than 2 are always displayed in their decimal representation.
If the calculator IO mode is set to MathIO, square roots will be displayed with the radical symbol. More complicated expressions with square roots might not be preserved and will be given as decimal numbers.

Oct 31, 2012 | Office Equipment & Supplies

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

How to covert decimal to fraction in fx-991es


Press the S--D key to convert a value between decimal and symbolic forms. Keep in mind that the calculator has limits on the number of digits in the numerator and denominator.

Oct 13, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

Hi there, I have a Casio fx-991ES, and my calculator doesn't seem to be converting decimals in surd form... i.e. 0.3354101966 was the last number I typed in that didn't work... That, in surd...


The calculator can't identify that this is a surd unless you input it as a surd, ie as 3/(4*sqrt(5))= when it will then show the equivalent form 3*sqrt(5)/20 (obtained by multiplying top and bottom by sqrt(5)) and you can swap between the two forms using the S<>D button. Even adding the next 4 decimal places (hidden) won't allow the calculator to identify the underlying surd as this is simply too complcated a calculation.

Jun 08, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

How do I have my casio 115 es give answers as decimals instead of fractions?


To convert a single value to/from fractions, press the S<>D key.

To get all answers in decimal form, press SHIFT [MODE] 2 to select LineIO mode.

Aug 16, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

When i divide it gives me a fraction answer. eg, 4/3 = 4/3 instead of 1.33


Hi,
You are not specifying the brand and model number of your calculator and that makes things more difficult for me. On the Casio calculators (FX-300ES, FX-115ES, FX-991ES) there is key labeled [S to D] which toggles between Fractions/Radicals To Decimals.
On other calculators (Sharp), the key may be labeled F To E.
You should look for a key that has two letters with a two-sided arrow linking the letters.

Why I even try to answer a question that lacks basic information and give the opportunity to the asker to shoot me dead is beyond me.

Anyway, I hope it helps.

Dec 10, 2009 | Casio Office Equipment & Supplies

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