Question about Casio fx-300ES Calculator

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I've tried again and again to reset my calculator so that it will answer problems like 7.4 x 2 as a decimal and not 74/5. It got in the way of first my college algebra work and now it's slowing down my chemistry homework. Please help, - Frustrated

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Hello,
When you calculate the product 7.4 x2, the calculator gives you a fraction reduced to it simplest terms, 74/5 . The result is correct, but it happens that you want it expressed as a decimal rather than a fraction. To fix that all you have to do is to press the button [S<->D] above the red [DEL] key. It allows you to toggle the display format between fraction and decimal.
74/5 [S<->D] changes display to 14.8 and if you press the key again you go back to fraction
14.8 [S<->D] 74/5

Similarly, if you enter square root of 2 and it displays as a radical, you convert it to a decimal by pressing the key [S<->D].

The fraction and radical formats allow you to do exact claculations. But if you do not want to hear about that you can just press [SHIFT][MODE][2:LineIO] : Your calculator will do things the old way, but you will lose some important functionalities.
My suggestion is to set the default mode [MathIO] by pressing [SHIFT][MODE][MathIO] and to press the [S<->D] key to convert to decimal.

Hope it helps.

Posted on Oct 17, 2009

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