20 Most Recent Casio FX-115ES Scientific Calculator Questions & Answers

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Your calculator is in binary mode. Press MODE 1 to switch to "normal" mode or MODE 2 to switch to complex mode.

Some keys have a letter of the alphabet next to them. The letters are A, B,C,D, M, X, Y. They correspond to memory registers (memory locations) in which you can store values.
To enter a letter as when you are entering an expression with variables, you press the [ALPHA] key followed by the key next to which is the letter you seek. To enter letter A, You press [SHIFT] [(-)] if I am not mistaken.

Question edited to give its full 'make model (what it is)' in correct order. Question moved for Audio Player category to a Scientific Calculator one. Yes, this unit does exist but not here in North America where we are located. https://www.google.com/search?q=Porpo+YH-2000+calculator ..

Press SHIFT [SETUP] 1 to set the MthIO mode. Try calculating the square root of 8 (press sqrt 8 =). Do you get 2sqrt2?

When you get a fraction for he answer: shift-S<->D[a b/c<->d/c]

This way, you change it to a mixed fraction or improper fraction

you want a line output

Shift > Mode > 2:LineIO or on the graphics one its sometimes 10:LineO etc.

look for something with line in it

Steve :P

How about recreating the error and reporting faithfully the error message? You get a syntax error if you try to invert a matrix by using the wrong key sequence such a
[SHIFT][MATRIX][3:MatA][X to ] -1), meaning that you use the universal power key on the same row as X squared and log and between them.
To calculate the inverse of a matrix, have the name of the matrix on the command line, (see above) then press [X to -1] key one row up from [log].

Concerning your implied affirmation that if the matrix is square you should not be getting any error: You will get an error ( a Math error) if determinant of the matrix is equal to zero.

Your calculator is in Table Mode.
Change the mode to Computational: Press MODE, select 1: COMP.

If your calculator is SetUp for Math Input/Output (MATHIO), a result that gives a radical will remain in radical form. If a radical appears in a denominator the whole expression is rationalized: Any radical left is put in the numerator. 1/Sqr(3) is displayed as Sqr(3)/3.

If got to do with the mode settings. Usually MODE fix in other lower version of calculator. The combination can be MODE FIX 0 for no trailing zero's if MODE FIX ONE then if will 0.0 or one zero then shifting the settings to NORMAL mode and at DEG mode.

To convert a single result to decimal, press the S<=>D button just above the DEL button. To have all results come out in decimal, press SHIFT MODE 2 to switch to the LineIO mode.

park's

Reset the calculator or store 0 in each memory location A, B, C,...

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.

How to turn off fx-911w? I tried shift and on. Shift and AC does not work also. Please help thanks

You cannot do it: the calculator does not have a Computer Algebra System (CAS).

Hello,
When you have a fraction output, press the [S<->D] key to convert to decimal, the same key to convert from decimal to fraction. Beware that fraction results are exact, while decimal values are approximate.
However if you cannot stand the sight of a fraction, there is a way to get rid of this type of output.
Here is how you do it.

[SHIFT][MODE][2:LineIO]. All your results will be in decimal. However you will lose a lot of functionalities, such as calculating the logarithm in any base, manipulating radicals.
My advice, if you allow, is to activate the [SHIFT][MODE][1:MathIO] and press the [S<->D] whenever you want a result (be it a fraction or radical) in decimal format.
Hope it helps.

Hello,
It may be due to the angle unit used. You can have angles in degrees, in radians, and in grads. You should set the default angle unit to waht you problem calls for.
To set degree as default SHIFT MODE 3
To set radians as default SHIFT MODE 4
To set grads as default SHIFT MODE 5

The values of angles calculated by the inverse trigonometric functions are in the default unit that is set . This may be the source of the wrong answers that you get.

Hope it helps.