20 Most Recent Casio fx-300ES Calculator - Page 3 Questions & Answers

Hello,
To make sure that results are always in decimal format, put a decimal mark (point) at the end of one integer.
ex: 1./2 or 1/2. or 1./2. display as 0.5, so does 1. + 1/2
To convert from decimal to fraction and from fraction to decimal press a b/c
To convert from proper to improper fractions use [SHIFT][d/c]
Hope it helps.

You have two Input/Output modes MathIO, LineIO. The latter is the old way of presenting fractions with the u or wedge as a separator. MathI0 displays fractions as you would see them in textbook. Set the input/output display to MathIO. To do so, reset your calculator or Press [SHIFT][Mode](Setup) and select 1:MathIO.

If you need a copy of the manual you may download one at http://www.fixya.com/support/p525835-casio_fx_300es_calculator/usermanual-02B0173-pdf See the section beginning on page E-21.

Set the Input Output Display mode to MathIO. In thsi mode answers are given in fraction-radical forms whenever possible. To toggle between Fraction/radical and decimal, press the S<=>D key. To access the above screen press [SHIFT][MODE](SetUp).

Press SHIFT MODE 8 then pick the desired norm mode.

This calculator cannot do algebra so it does not handle polynomials. It does not have an EQN (equation) solving mode so you cannot enter an expression set = 0 and solve it for an unknown variable X.It does have a table Mode where you can enter an expression y= F(X) and generate a table of values. If in the expression F(x) a numerical coefficient is a fraction just enter it as a fraction, possibly enclosed in parentheses. If it is a decimal number just enter it as a decimal number. Converting it to a fraction is not going to generate any more precision in the result. You lose precision when you go from fraction to decimal, but you do not make a number more precise by converting it from a decimal representation to a fraction.

Press the S<->D button located just above the DEL button.

The calculator belongs to a new generation of scientific calculators that enjoy the feature called MathPrint by TI, Natural Display by Casio, and WriteView by SharpWhen the calculator is configured to work with this Display you are shown a template as you would see on a textbook. The squares are the places where you enter the numbers. For example when you press the fraction key the calculator displays a the picture of a stacked fraction with one square on either side of the horizontal fraction bar. The square where the cursor is located and blinking appear dark. You start entering the numerator there, then you use the down arrow to move to the denominator. When fraction is finished you move the square away from the fraction to the main line using the right arrow key.I hole this solves the annoying problem of the mysterious squares.Please read the manual to learn about this feature so that you can decide whether to take advantage of it or not.

A ratio is a comparison between two quantities which is often represented as a division operation.

From the other question posted it appears that your problem is not with the scientific display, rather it is with decimal representation (approximate) or fraction/radical (exact). representation. If your results are in fraction/radical form press the [S<>D] key to switch from one to the other.The calculator is by default in the MATHIO t output mode: results are in fraction/radical form.If you don't like to work with this mode just change the IO mode to LineIO. To do so, press [SHIFT][Mode](Setup) and selct 2:LineIO

The key is marked [Shift] on Casios, [2nd] on TI's, and [2nd F] on Sharps. I have seen some cheap calculators that mark the key as [Inv]. HP calculators are rather different in that respect.

Yes and yes.

If there are no keys that allow you type letter, then it would be considered non-alphanumeric

This calculator does not have an equation solving routine. You will have to solve it by hand. Try to guess what number, which added to 2 gives a sum of 3? You have it! x=1