Question about Casio FX-260 Calculator

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You can always convert a fraction to a decimal. The reverse may not always be possible. Look at the example on the screen capture.

You may be lucky and recover a fraction you have just converted into decimal format, but you cannot just write 0.333333333333 and expect the calculator to convert it to 1/3: The true fraction 1/3 has an infinite number of 3's after the decimal mark.

Posted on Jun 22, 2010

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Posted on Jan 02, 2017

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Conversion is not always possible. If a decimal result has just been found and displayed, pressing the [a b/c] fraction button may convert the result still in answer memory (ans) to a fraction. But if you alter the value of answer memory and type in the (approximate) decimal value that you copied from the screen, you may not get your correct fraction.

Sep 22, 2014 | Canon F-603 Calculator

The way it works is as follow. If a result is displayed as a fraction you can convert it to its decimal representation. **If you do nothing after the conversion**, you can revert the decimal representation to the fraction.

Apr 29, 2014 | Texas Instruments Office Equipment &...

None of these solutions answer his question. When converting a fraction or any number with decimal places to Binary, the TI-89 gives "Error: Domain error." For example, entering .6875 [2ND][MATH][BASE][BIN] does not work. I haven't found a way to do it with built in functions. In order to do these types of conversions, I use the following method.

Convert: 0.6875 to Binary

- left of decimal is a 0, so write down a 0, then a decimal point: (0.)

- multiply .6875 x 2 = 1.375 left of decimal is 1, write a 1: (0.1)

- drop the 1 and multiply .375 x 2 = .75 left of decimal is 0. write a 0: (0.10)

- multiply .75 x 2 = 1.5 left of decimal is 1, write a 1: (0.101)

- drop the 1, multiple .5 x 2 = 1. left of decimal is 1, write a 1: (0.1011).

- since there is no more fraction, the final answer is (0.1011). Hope this helps.

Convert: 0.6875 to Binary

- left of decimal is a 0, so write down a 0, then a decimal point: (0.)

- multiply .6875 x 2 = 1.375 left of decimal is 1, write a 1: (0.1)

- drop the 1 and multiply .375 x 2 = .75 left of decimal is 0. write a 0: (0.10)

- multiply .75 x 2 = 1.5 left of decimal is 1, write a 1: (0.101)

- drop the 1, multiple .5 x 2 = 1. left of decimal is 1, write a 1: (0.1011).

- since there is no more fraction, the final answer is (0.1011). Hope this helps.

Jan 27, 2012 | Texas Instruments TI-89 Calculator

The calculator has two Input/Output modes: MathIO and LineIO.

LineIO

LineIO is the old way of entering numbers in calculators and results are always displayed as decimal numbers. Some calculators have a fraction feature and would convert a fraction to a decimal number and back.

MathIO

In MathIO you enter expressions as you would by hand or as you see them written in textbooks.

In this mode, results are by default displayed as fraction or fractions/ radicals.

Conversion

To convert the fraction/radical to decimals you just press the [SD] key. If you press again you cycle through all the available display formats.

So you can (if you want) use the MathIO to manipulate expressions and convert only the last result to decimal. By the way, fractions and radicals are generally more accurate than their decimal representations.

SetUP

If however seeing fractions and radicals is too painful, just set the LineIO as your default mode. To do so press [SHIFT][MODE] to open (SETUP), then select [2:LineIO]

LineIO

LineIO is the old way of entering numbers in calculators and results are always displayed as decimal numbers. Some calculators have a fraction feature and would convert a fraction to a decimal number and back.

MathIO

In MathIO you enter expressions as you would by hand or as you see them written in textbooks.

In this mode, results are by default displayed as fraction or fractions/ radicals.

Conversion

To convert the fraction/radical to decimals you just press the [SD] key. If you press again you cycle through all the available display formats.

So you can (if you want) use the MathIO to manipulate expressions and convert only the last result to decimal. By the way, fractions and radicals are generally more accurate than their decimal representations.

SetUP

If however seeing fractions and radicals is too painful, just set the LineIO as your default mode. To do so press [SHIFT][MODE] to open (SETUP), then select [2:LineIO]

Feb 17, 2011 | Casio fx-300ES Calculator

Enters a proper or improper fraction,

b?c (b { 6 digits, c { 3 digits). When

possible, improper fractions are

displayed as mixed numbers.

3 F 4 3?4

8 3 J 21?4

Single-variable functions display

decimal results.

1 F 2 0 0.25

a F b F c Enters the mixed fraction a b?c.

(a, b, c { 3 digits each, with the total

digits { 8).

6 F 4 F 6 64?6

J 62?3

"s Toggles display between a mixed

number and an improper fraction.

30 F 4 30?4

"s 71?2

"s 15?2

"s 71?2

"y Toggles display between fraction and

decimal.

55 F 24 55?24

"y 2.291666667

"y 27?24

If a result would overflow or if fixed decimal is 0, no

fraction to decimal conversion occurs. It is not an error.

Denominator must be a whole number {999.

b?c (b { 6 digits, c { 3 digits). When

possible, improper fractions are

displayed as mixed numbers.

3 F 4 3?4

8 3 J 21?4

Single-variable functions display

decimal results.

1 F 2 0 0.25

a F b F c Enters the mixed fraction a b?c.

(a, b, c { 3 digits each, with the total

digits { 8).

6 F 4 F 6 64?6

J 62?3

"s Toggles display between a mixed

number and an improper fraction.

30 F 4 30?4

"s 71?2

"s 15?2

"s 71?2

"y Toggles display between fraction and

decimal.

55 F 24 55?24

"y 2.291666667

"y 27?24

If a result would overflow or if fixed decimal is 0, no

fraction to decimal conversion occurs. It is not an error.

Denominator must be a whole number {999.

Nov 28, 2010 | Texas Instruments TI-30XA Calculator

There is no built-in conversion between decimal and fraction.

Nov 20, 2010 | Texas Instruments BA-II Plus Calculator

Pressing the [S

Sep 10, 2010 | Casio fx-300ES Calculator

- Put a decimal mark at the end of one integer in the expression, 15./2 or 15/2. or 15./2. all give 7.5 as result
- OR press [diamond][ENTER] to force conversion of a fraction to a decimal number,
- OR press [MODE][F2] and scroll to line EXACT/APPROX, press right arrow to unfold the menu list and select [3:Approximate]

Mar 29, 2010 | Texas Instruments TI-89 Calculator

A fraction is in fact a ratio of two number: a division of a numerator by a denominator. The key used for the division operation is the one above the multiplication sign and below the caret [^], and in thee rightmost column of keys.

Beware that this calculator converts any ratio of two numbers into a decimal value. To keep a fraction in a fraction form you must use the [|=>Frac] or [ToFrac] command. To convert a decimal result to a fraction, use the [|=>Dec] command.

These commands are accessible through the CATALOG or more easily by pressing [MATH] (under the ALPHA key) and selecting [1:|=>Frac], or [2:|=>Dec]

Ex: to keep 27/48 in fraction form you enter

27 [/] 48 [MATH][1:|=>Frac] [ENTER]. Result is 9/16

You will notice that the resulting fraction is reduced to its simplest form.

To convert the above result from fraction to decimal press [MATH][2:|=>Dec]

A fraction can always be approximated by a decimal value but the converse is not always possible.

Beware that this calculator converts any ratio of two numbers into a decimal value. To keep a fraction in a fraction form you must use the [|=>Frac] or [ToFrac] command. To convert a decimal result to a fraction, use the [|=>Dec] command.

These commands are accessible through the CATALOG or more easily by pressing [MATH] (under the ALPHA key) and selecting [1:|=>Frac], or [2:|=>Dec]

Ex: to keep 27/48 in fraction form you enter

27 [/] 48 [MATH][1:|=>Frac] [ENTER]. Result is 9/16

You will notice that the resulting fraction is reduced to its simplest form.

To convert the above result from fraction to decimal press [MATH][2:|=>Dec]

A fraction can always be approximated by a decimal value but the converse is not always possible.

Jan 23, 2010 | Texas Instruments TI-84 Plus Calculator

Hello,

Once you enter a fraction the calculator calculates it and displays a decimal result.So basically you cannot do fraction manipulations. However you can convert a decimal result into a fraction. To do the conversion, you enter the decimal number then you Press [MATH] and [1]. (** -->Frac)** The number will be converted.

Similarly you can enter a fraction to a decimal number**(-->Dec)**

[MATH] [2:] [ENTER]. But I see no point in doing that, because any fraction entered is displayed as a decimal number.

Hope it helps

Once you enter a fraction the calculator calculates it and displays a decimal result.So basically you cannot do fraction manipulations. However you can convert a decimal result into a fraction. To do the conversion, you enter the decimal number then you Press [MATH] and [1]. (

Similarly you can enter a fraction to a decimal number

[MATH] [2:] [ENTER]. But I see no point in doing that, because any fraction entered is displayed as a decimal number.

Hope it helps

Sep 03, 2009 | Texas Instruments Office Equipment &...

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