Casio FX-115ES Scientific Calculator - Answered Questions & Fixed issues

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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 ..

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

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.

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

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,...

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

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.

Just order 2 larges.

Let x be the number of future weeks. 8 + 4x >= 30 Solve for x by subtracting 8 from each side and dividing by coefficient in front of variable. Plug answer into original equation to check that it works correctly. Good luck, Paul

You can use the replay button to display the last command entered, then move cursor to the end of the command line and append the part you want to add. But it must be a part of the same command line, with correct syntax. As to the last result calculated, it is stored in ANS memory. It will be overwritten by the new calculated value.

Here check the manual:

http://support.casio.com/manualfile.php?rgn=5&cid=004001004

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

Hello,
To convert fractions to decimals or decimals to fractions, you use the [S<->D] key. Each time you press the key the result is displayed in the other format.
Alternatively, If you multiply or divide two integer numbers put a decimal mark at the end of one of the numbers (any one). The result will be displayed in decimal format.

Hope it helps.

Page E-3 of the manual. Press the ALPHA key and then the key to input the applicable variable, constant, or symbol. You can download the manual from here: http://support.casio.com/storage/en/manual/pdf/EN/004/fx-115_991ES_PLUS_C_EN.pdf

Press SHIFT SETUP 1

With log a / log b = loga (b) formula

In casio for log2 8 = log8 / log 2 = 3