Question about Casio fx-300ES Calculator

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Square root on FX-83ES

When i try and get a square root i press the number i want to find the root of, then shift and the power/power root key. I apply the root i want but it doesn't give me the root. I tested it with the sq root of 4 by putting in 4 then shift and the button...apply the 2, close brackets and i get a result of 1.1892....not the square root of 4! What am i doing wrong? Please help

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  • Anonymous Dec 01, 2008

    i cant get the square oot button to work

  • Anonymous Mar 19, 2014

    I need to square root to the 17th power, how do I do that?

  • Anonymous Mar 19, 2014

    imaginary numbers and leave in I form

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1 Answer

Make sure you havnt droppend your calculator as this can damage the chip, if so , re solder broken parts and it sshould work, this happened on mine and after i soldered it it is fixed.
online companies can fix it if you send it away

Posted on Sep 10, 2008

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1 Answer

How do i find the square root of a number on the casio scientific calculator


If, for example, you're getting the square root of 3 as the square root of 3, press the S-D button (just above the DEL) button to convert the symbolic result to a decimal result.

If you want all results to come up in decimal, press SHIFT SETUP 2 to select the LineIO mode.

Feb 03, 2015 | Casio fx-115ES Plus Scientific Calculator

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Howe do I calculate F(x)= 3 to the power of the square root of (x-3). Specifically I am asking what keys I need to press.


The square root key has a marking that looks like the letter V. It usually is the shifted function of the square key (^2).
Note that nth-root is the same as power to the (1/n). See a few examples below.

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Jul 22, 2014 | Casio FX-115ES Scientific Calculator

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I am trying to do a financial calculation using a casio fx-83es calculator. The calc is to do with average rate of return each year. the calc is 5 square root symbol 1.734= 1.1164? How do I calculate


You should be careful with the symbols you are using. Roots are different. When you say `5 square root symbol 1.734` you are in fact doing the following: 5x square root(1.734) which is 6.5850.
What you need to do is extract the fifth root of 1.734.
The key to use to extract a root of index n (in your case 5) is to press the digit key for the index, then press [2nd][Y^x]. On the calculator near the [y^x] key you can see xRoot. This is the universal root key.

Jul 16, 2012 | Casio Calculators

2 Answers

How do I simplify a cubed root of a number on the fx-300ES?


It can handle square root but if result requires too much display space it will be displayed as a decimal.As to higher order roots such as cube , 4th and higher they are displayed as decimal. Sorry, there is nothing you can do about it.

Apr 18, 2012 | Casio fx-300ES Calculator

1 Answer

I dont know how to find the square root on my casio fx-300ES scientific calculator problem it wont let me square root 42 , when i square root 42 , 42 keeps coming and not the answer


To calculate a square root you press the square root key. A radical will be displayed. You type in the positive number whose root you want. Press the EXE key.

Sep 07, 2011 | Casio fx-300ES Calculator

1 Answer

Trying to find the surface area of a sphere given the volume: V = 4/3 X pi X r cube problem given vol. find the surface area v = 5000 5000(3/4 pi =r cube the book reads: 3 cube before and the square...


Almost exactly the way it's written in the book.

In the LineIO mode press
3 SHIFT [xth-root] 5 0 0 0 * 3 / ( 4 * SHIFT [pi] ) ) =

In the MathIO mode press
SHIFT [xth-root] 3 right-arrow 5 0 0 0 * 3 / ( 4 * SHIFT [pi]) =

xth-root is the shifted function of the key just below and right of the big round cursor pad.
* is the multiply key
/ is the divide key
pi is the shifted function of the x10^x key in the middle of the bottom row

BTW there's no "square root" in this problem. There's a "cube root" or "third root". Square root is the second root.

May 14, 2011 | Casio fx-300ES Calculator

1 Answer

How do i find square root of a number on casio FX-115ES?


Press the square-root key (third row from the top, second column from the left). Type in the number and press =. If you get a symbolic result, press S-D to convert or else press SHIFT ENTER instead of ENTER. If you don't want to see any symbolic results, press SHIFT MODE 2 to switch to the LineIO mode.

Dec 05, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

How to find nth root using Casio FX-83ES


You use the power root function key accessible with the key sequence [SHIFT][X ^]. I am inserting a screen capture from the manual to show you the sequence.

On the third line of the capture (power root) is the key you must press. In the small rectangle to the left of the radical sign you enter the order of the root: 2 for square root, 3 for cube root, 4 for 4th root and son on.

To calculate the decimal log you use the [LOG] key as shown on capture. For natural log (ln), use the [LN] key. The argument (2/3) in your example should be enclosed inside the parentheses.
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Jun 04, 2010 | Casio fx-300ES Calculator

1 Answer

How do i do a number 'to the power of 1/2 or 2/3? cheers Brad


Power 1/2 is the same as square root: You can use the square root key to the left of the square key.
Similarly power 1/3 is the cube root. You use the [SHIFT][Square root] key sequence.
Power 2/3 is the square of the cube root, or the cube root of the square.

More generally, you can use the universal power key, marked with X with a raised white rectangle. It is between X square and log.

Ex: Calculate 15^(2/3)
15 [X with raised rectangle] 2 [/] 3 [)] [=]; the result is 6.082
The last parenthesis closes the left parenthesis introduced by the calculator.
Alternatively you can use the cube root and the x-root selections available under the MATH menu.(selections 4 and 5)
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Mar 14, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

How to use the exponent key on a casio fx 300ES calculator ?


The key to use for the square, and the cube are well marked and they share the same physical key (X to 2) or [SHIFT][X to 2]. Similarly the keys to use for the square root and the cube root share the same physical location (the square root key, to the right of the square key).

For any other exponent, including fractions and negative exponents you use the universal power key labeled [X to ] ( X with a raised square).
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  2. You press the [X to ] power key.
  3. You close the parenthesis (the right one).
  4. You press [=]
Sometimes the result may not be displayed as a decimal number, but as a radical (if you take a root). To make sure it is displayed as a decimal number, in step 4 above, press [SHIFT][=]

Mar 13, 2010 | Casio FX-300W Plus Calculator

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