Hello pls tell me how to refresh my fx-115es?

Press SHIFT MODE 2 to switch to the LineIO mode.

Actually, the answer is 79.

The fx-115ES does not have a key for the modulus operation. Nor does it have an integer-part or fractional-part operation. However, it is possible to calculate the remainder using integer arithmetic.

Press MODE 4 to shift into integer mode. Then type in 3 5 2 - 9 1 * ( 3 5 2 / 9 1 ) = and see the answer 79. It's a pain as both numbers have to be entered twice, but it does get the job done.

To get back to working with real numbers again, press MODE 1 ( or MODE 2 for complex).

Press SHIFT MODE 2 to switch to LineIO mode.

Here check the manual:

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

What do you really want to do? 360/29 gives 12.4137931 degrees. Is it not 360 divided by 30? That looks more common, and the result is 12 degrees. That is what you get if you want to inscribe a regular 30-gon in a circle.

Hello,
The scientific prefixes are

1. Giga = 1 billion ( times 1 000 000 000)
2. Mega = 1 million (times 1 000 000)
3. Kilo = 1 thousand (times 1000)
4. deca = 10 (times 10)
5. deci = one tenth ( divided by 10) or multiply by 0.1
6. centi = one hyndredth (divide by 100) or multiply by 0.01.
7. milli = one thousandth (divide by 1000) or multiply by 0.001
8. micro = one millionth (divide by 1 000 000) or multiply by 0.000 001
9. nano = one billionth (divide by 1 000 000 000) or multiply by 0.000 000 001

So 1 milliliter = 1mL = 1L/1000 = 0.001 L
1L = 1000 mL
It is instructive to learn the meaning of these prefixes, because they always mean the same thing, regardless of the units you are dealing with.
Ex: The population of the Earth is about 6 Gigapersons (It does not exists, but it illustrates the principle. I hope you win a jackpot of 10 megadollars. (M$)

Hope it helps.

Hello,
Use the [S<->D] key to switch between the two.
Hope it helps.

Hello,
The best advice I can give you is to unfold the user manual and start one step at a time . Detailed exemples of each kind of calculation are in the appendix to the user s annual.
Sorry I have no easy way to show you how to input without images.

Good luck

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.

According to the manual for the Casio FX115ES, the largest matrix it solves is a 3x3.