Question about Casio FX83ES Scientific Calculator

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My calculator won't give me the correct average.

If i put in 1.94+2.35+4.38 (divide symbol)3 it gives me 0.9633333' or 5.97 or some other random thing. Tres annoying.

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You need to use parentheses to group the additions together since division has precedence over subtraction. If you enter 1.94+2.35+4.38/3 then calculator takes that to mean 1.94+2.35+(4.38/3). You need to enter it as (1.94+2.35+4.38)/3.

Posted on Oct 20, 2013

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Posted on Jan 02, 2017

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SOURCE: problems with fractions on the Casio fx-115es

To convert fractions to decimals or decimals to fractions, you use the [S<->D] key. Each time you press the key the result is displayed in the other format.
Alternatively, If you multiply or divide two integer numbers put a decimal mark at the end of one of the numbers (any one). The result will be displayed in decimal format.

Hope it helps.

Posted on Sep 12, 2009

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SOURCE: my calculator won't give me decimal numbers

Use the [S<->D] key to switch between the two.
Hope it helps.

Posted on Sep 24, 2009

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SOURCE: I ask a dividing question like: 8 divided by 10,

If a number is displayed as a fraction or a radical (square root or other roots) you change it into a decimal number by pressing the [S<=>D] key, just above the red [DEL] key.
If you do not care for fractions or radicals, you configure your calculator to display only decimals. To do that you press [SHIFT][MODE][2:LineIO].
Warning: If you do that you will not be able to enter fractions or radicals in the natural (textbook display)
Another way to display a fraction or a radical as a decimal is to press [SHIFT][=] to get the result not the [=] alone.

Hope it helps.

Posted on Nov 14, 2009

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SOURCE: how do i get a decimal on division instead of a

  1. If a fraction (or a radical) is already displayed press the [S<=>D] key to convert it into a decimal number.
  2. If you are entering an expression and want its result displayed as a decimal number, press the [SHIFT][=] key sequence instead of just [=].
  3. More permanent solution: If you do not want fractions nor radicals, configure the Input/Output to be LineIO. To do that, press [SHIFT][MODE] to access the (SETUP) then select the option [2:LineIO]

Posted on Jun 01, 2010

  • 3 Answers

SOURCE: I am using FX-83GT calculator when I divide a few

Try using the S<>D(above the orange DEL button) button after you've obtained your result..

Posted on Aug 22, 2010

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MOD simply calculates the remainder that is left over after dividing by the MOD parameter.
For example, 10MOD7 = 3 since you can only divide 7 into 10 once, leaving a remainder of 3.
For larger numbers, eg 389487MOD31 you start by dividing 389487 by 31, which gives 12564.09677 (on the display), however you only want the fractional part so subtract 12564 to give 0.0967741935 . This includes the lower value digits that were previously hidden. Then multiply this result by 31 which gives 2.999999999 on the display. Since the result of a MOD calculation has to be a whole number, the answer needs to be rounded to 3. If the answer doesn't easily round to a whole number, it is likely that you have gone beyond the calculators working capacity.
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I think you meant to divide 65250 by 1450, the result of which is 45.

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To change a result from Fraction/radical to a decimal approximation, press the key marked S<>D. To completely prevent the display of fractions, change Input/output configuration.
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You'll get the same error if you try to divide two matrices with real numbers. The TI-89 doesn't allow you to divide a matrix by another. However, you can multiply a matrix by the reciprocal of the other.

For example, to calculate A/B, calculate instead A*B^-1 . Makes sure you use the (-) key just to the right of the decimal point key to put in the negative sign before the "1".

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Played 32 won 29 what is the win %

Divide 29 by 32 then multiply by 100. Since you didn't give the make and model of the calculator, I can't give you the exact sequence of keystrokes.

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1 Answer

How I can put my calculator to work for me? I

I am afraid you cannot do it with the TI83,because it cannot solve symbolically for y. It can give you y for particular values of x, but cannot give you a general formula for y.

You should strive to be efficient in your reasoning. For exemple simplify your equations as much as you can. For the one you gave, you could have simplified all terms by dividing by 3, leaving 3x-y=3 or y=3x-3. As you can see it is already solved for y.

The function that solves an equation is called solve( . It is accessed through the catalog: [2nd][0] (CATALOG) [LN] (S) then scroll down to find it. Highlight it and press [ENTER].

Hope it helps.

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When I divided a problem EX. 3/2 the calculator will not answer in decimal

You are not dividing problems, you are dividing number. This said, there is a simple way to ensure that the results of divisions are displayed in decimal form: It consists in putting a decimal mark (decimal point) at the end one integer (whole number)
3/2. gives 1.5
3./2 gives 1.5
3./2. gives 1.5

You can also configure your calculator to display all numerical results in decimal format. To do that press [MODE][F2]. Use the down arrow to select the ligne Exact/Approx, then use the right arrow to unfold the menu options 1:Auto
Select 3:Approximate and press [ENTER]

Hope it helps.

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Hope it helps.

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