Question about Casio FX-115ES Scientific Calculator

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I just bought this fx-115es and am entering 5x3.3= and getting an answer of 33/2, althought it is right how do i get it to answer 16.5

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  • Casio Master
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Hello,
There are several ways you can extract decimal numbers from this fine calculator.

In MathIO Mode

1. Once a fraction or radical is displayed press [S<=>D] button to convert it to decimal. Pressing it again restores the fraction or radical display.
2. Instead of pressing the [=] key to obtain a result, press [SHIFT][=]. The result will be displayed as a decimal number.

In LineIO
If you do not care for exact calculations with radicals and fractions, just change the default mode from MathIO to LineIO. To do so
press [SHIFT]{MODE][2:LineIO]. In this input/output mode all results are decimal.
Please be informed that with this mode you will not be able to access the formula templates that allow you to enter fraction as you see them in textbooks (the natural display format). You lose other neat functionalities also.

As a suggestion, if you like the natural display for input keep it as default, and press [SHIFT][=] to display decimal results or [S<=>D] to convert display to decimal format.

Hope it helps.

Posted on Nov 16, 2009

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1 Answer

How do i get the ee to work on my casio fx-115es plus?


What you call the EE ((entering power of 10 exponents) is done with the help of the key at the bottom right, and marked [x10^X].
To enter 6.02x10^23, you do as follows
6.02 [x10^X]23. When you use that short-cut key, no 10 should appear on the command line. See screen capture.

41e84ea3-2658-49be-8ce0-51b7ea24192c.png

Sep 08, 2014 | Casio fx-115ES Plus Scientific Calculator

Tip

Negative numbers with even exponents on casio fx-115es


When you push the change sign (-) button, a number button, and any even power it returns a negative value.

In other words if you type -4^2 it will treat it like this:

-(4)^2 = -16

Even though any number to an even exponent should be even. To get around this any time you have an even power on a negative number type it like this.

(-4)^2 = 16


on Apr 30, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

Casio FX-115ES Scientific Calculator


You have the calculator set to Polar notation. In Polar form -2.16 is 2.16 angle 180. To get out of this, press SHIFT MODE down-arrow 3 1 .

Jul 29, 2012 | Casio FX-115ES Scientific Calculator

1 Answer

I forgot how to do linear regression on casio fx-115ES. Example: (1,2), (3,Y), (5,6). How can i solve for Y in casio FX-115ES?


Press [MODE][3][2]. In first column enter known x-coordinates (1 and 5), in second known y-coordinates (2 and 6). The solution you are looking for is in form Y=A+B*X where X=3. Your calculator computes A and B after you enter data. To calculate Y (which is equal to A+B*3 press [SHIFT][1][7][1][+][SHIFT][1][7][2][*][3][=]. The result should be 4.

If I helped you, please rate my answer :)

Sep 07, 2011 | Casio FX-115ES Scientific Calculator

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I have a Casio fx-82au plus and want to input logs to the base less than 10. Is there a way to do this? eg log to the base of 2 = 16 (answer is 4 but how do we get that to work on this calculator).


You can calculate the logarithm to any base by using the relationship
logb(x) = log(x)/log(b) = ln(x)/ln(b).

To calculate the log base 2 of 16, either divide the log of 16 by the log of 2 or the ln of 16 by the ln of 2.

Apr 07, 2011 | Casio FX-115ES Scientific Calculator

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CASIO fx-115ES I need to calculate and fnd a modulus remainder.I need to divide the number 352 by the number 91 and find the remainder. I need to use the modulus operator. Can this calculator perform...


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).

Feb 26, 2011 | Casio FX-115ES Scientific Calculator

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I'm using the Casio fx-115ES model. When i try to put in 52 Degrees, 10 minutes, I dont seem to be able to do this. I key in the numbers 52 then hit the "degree, minutes seconds" button and i get the...


When entering the information it only shows the degree symbol. If you press enter or type inthe formula, then the answer will show the Degree, Minutes, and seconds. It seems to be the way it was program by Casio. It still seems to work fine for entering that information

Aug 03, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

What steps should I use to get the answer for the following using my Casio fx-115ES: [(In(1.02)-In(0.71)squared divided by 3.92 squared]? Thanks!


Enter it almost exactly as you typed it. Just remember that ln will automatically enter the left-parenthesis, and that you don't need to close all parenthesis before pressing =.

( ( ln 1 . 0 2 ) - ln 0 . 7 1 ) x^2 / 3 . 9 2 x^2 =

Aug 01, 2010 | Casio FX-115ES Scientific Calculator

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How do I enter pi on Casio fx-115es?


Enter your number then press (shift) then (X10x) key. That will enter pi. then press (=) for the answer.

Jul 03, 2009 | Casio FX-115ES Scientific Calculator

3 Answers

Inputing factors on a casio fx-115es calculator


Unless I am failing to understand your problem, just combine like terms to get:
9x^2+2x+4 and then enter those coefficients into the quadratic solver.
That will get you the two answers -- both of them will be complex.
If you wanted to turn those two answers into factors (complex) of the original equation simply
change the signs on each and put an x in front.
Of course, the quadratic formula would also work.
CG

Apr 17, 2009 | Casio FX-115ES Scientific Calculator

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