User manual casio fx 29 - Casio FX-260 Calculator

SOURCE: Download of User's Guide - In English

You can find it oin CASIO site:
http://support.casio.com/manualfile.php?rgn=1&cid=004001014

SOURCE: entering denominator into casio fx-115ES calculator

Yeah use bracket sign if it in double enclosed use two open parenthesis and close on the other other side. Usually it is max it in triple parenthesis or bracket.

Example

((2x-2)-(2x+4)) { = usually means you gonna use three parenthesis or bracket ((( ))).

[ = means (( ))

( = means single ( ).

Goodluck.

SOURCE: I need a manual for my Casio fx-260 solar calculator.

I have the User's Guide for fx-260SOLAR calculator
The manual is similar as for fx-82Solar calculator.
In Guide thei recomendet : http://world.casio.com/edu
But website has moved to http://edu.casio.com/
Nataly

SOURCE: how can I find :11^27mod

11^27 = 13,109,994,191,499,930,367,061,460,371 which is 29 digits long.

You can get this result from the Windows calculator (scientific view) by entering 11 and then pressing x^y 27 = . Then use Mod 29 = to get the result, which is 8.

Unfortunately the Casio fx-991ms (as with most other calculators) doesn't have nearly enough digits to cope with this type of calculation. You therefore need to split the calculation down into more manageable chunks, as follows, which works on most calculators:

First calculate 11^3 = 1,331 and work out Mod 29, which is 1,331 - 45×29 = 26.
Then calculate 26^3 = 17,576 and work out Mod 29, which is 17,576 - 606×29 = 2.
Finally calculate 2^3 = 8. Since this is less than 29, it is also the final answer as confirmed above.

This method can be used with any power number that can be factorised into numbers that don't cause the available digits of the display to overflow. In this case 27 = 3×3×3 so each step involves cubing the previous answer.

SOURCE: CASIO FX-7100 SIENTIFIC CACULATOR

Here is the link to the Casio manual download page. I can't see your model number among them, but maybe there is a typo in your question.