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Casio fx-55 calculator stuck in fix - Casio FX-55 Calculator

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Posted on Jan 02, 2017

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

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!"

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SOURCE: casio fx-82es significant figures

it should...

it can be found by SHIFT then MODE then SCI is the one you want to choose

Posted on Jan 21, 2010

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SOURCE: FX-55 Calculator: how do I clear my casio scientific calculator from...

press the "MODE" button 3 times and then press 3 ..., now this is normal mode

Posted on May 21, 2010

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1 Answer

How do you reset this the fx-55 calculator.

Check the result display mode (FIX, FLOATING). Choose Normal 1 or Normal 2 (if you have them).

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How to use tan^2(55)

It's a quirk of notation. When a book says tan^2(x), it actually means (tan(x))^2. Only the trigonometric and hyperbolic functions seem to get written this way. If one wants the square of a logarithm, for example, one doesn't write log^2(x).

The short answer: if you want tan^2(55), calculate tan(55) then square it.

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How to remove the FIX at the top of my calculator?

Press the FIX button change to floating.


Nov 23, 2010 | Casio FX-55 Calculator

1 Answer

FX-55 Calculator: how do I clear my casio scientific calculator from...

press the "MODE" button 3 times and then press 3 ..., now this is normal mode

May 17, 2010 | Casio FX-55 Calculator

1 Answer

How to get calculator out of fix mode

press MODE key until it displays
Fix Sci Norm
1 2 3

press the 3 key to select normal mode
(1 selects fixed notation, 2 selects scientific notation)

Feb 26, 2010 | Casio FX-55 Calculator

1 Answer

My caluculator is stuck on the word fix

A popular question. I Googled "casio fx-55 users manual" The first link will bring you to all the casio questions on this site. Others have posted the same problem. Possibly one of the existing solutions will work for you. I don't want to steal someone's solution. Look for yourself cause it will be a specific series of keystrokes.

Oct 04, 2009 | Casio FX-55 Calculator

1 Answer


Hit FIX , then the decimal point

Mar 02, 2008 | Casio FX-55 Calculator

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