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

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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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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.

Posted on Nov 01, 2012

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Posted on Jan 02, 2017

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SOURCE: how do i change the mode on my Casio fx-82au plus calculator?

Press SHIFT [MODE] to bring up the mode screen. Press 8 for NORM, then 2.
Bear in mind that if the magnitude of the number is too large or too small the calculator will switch to scientific notation anyway. For example, if a number has twenty leading zeros then it won't fit on the display unless it displays it as a power of ten to the negative twenty.

Posted on Apr 02, 2012

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SOURCE: Hi there, I have a

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.

Posted on Jun 30, 2011

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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


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.

Jan 01, 2014 | Office Equipment & Supplies

1 Answer

How do you simplify surds


Most calculators (except perhaps the TI89) can't do this sort of simplification, so you will need to factorise the number yourself to get sqr(200) = sqr(2*100) = sqr(2) * sqr(100) = sqr(2) * 10.

May 29, 2012 | Casio FX-7400G Plus Calculator

1 Answer

How do i change the mode on my Casio fx-82au plus calculator?


Press SHIFT [MODE] to bring up the mode screen. Press 8 for NORM, then 2.
Bear in mind that if the magnitude of the number is too large or too small the calculator will switch to scientific notation anyway. For example, if a number has twenty leading zeros then it won't fit on the display unless it displays it as a power of ten to the negative twenty.

Apr 02, 2012 | Casio Office Equipment & Supplies

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

Simplified answers


goto setup and click mathIO, this will do

Nov 01, 2009 | Casio FX-115MS Plus 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

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