Question about Casio FX-115ES Scientific Calculator

Hi, I have a Casio calculator fx-991MS and its giving me wrong answers. For example 1/120 my calculator says its 8.3333... but the right answer is 0.0083. How do I fix this?

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Hello,

I am only looking for a plausible cause of the error, because I do not believe your calculator can make such a mistake. I think you **accidentally activated the Exponential display format** and did not pay attention to the small, raised -03 that came at the end of the number displayed. It is a common mistake for those not very familiar with Scientific or exponential notation.

Let us try to reset your calculator to the normal (floating point) format.

Press the [MODE] key a number of times until you reach a screen that has FIX, SCI, NORM and under each one a number (FIX 1, SCI 2), Norm 3). To have the number of decimal place you gave in your result (4 decimal digits), you press 1 to select Fix then 4.

Be aware that scientific calculators usually stop displaying results in floating point format ( 0.0000045 ) if the number is smaller then 0.001. So basically, 0.00099 will be displayed as 9.90-04, -04 being raised above the level, and in smaller size.

Hope it helps.

Posted on Oct 02, 2009

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Posted on Jan 02, 2017

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Casiodisplay format (Disp) settings while the calculator is in the BASE ... Be sure to checkthe current calculation mode (SD, REG,. COMP ... Use [ and ] to display the expression 4 + 4. Press A ... want to perform scientific function calculations. COMP .

Dec 03, 2015 | Casio Office Equipment & Supplies

The answer is correct. It is your understanding of priority of operations that is at fault.

As written your expression is calculated as follows

-2/2600 +10+3.

To ensure that an expression is calculated as you want it, enclose parts of it in parentheses. See the screen capture below.

As written your expression is calculated as follows

-2/2600 +10+3.

To ensure that an expression is calculated as you want it, enclose parts of it in parentheses. See the screen capture below.

Nov 26, 2015 | Casio Office Equipment & Supplies

Here is a sample of the percentage calculations that the calculator can perform. You will not see among them the conversion from decimals to percentages.

To convert from decimals to percents move the decimal mark 2 places to the right and append the % sign.

To convert from percents to decimals, move the decimal mark 2 places to the left.

To convert from decimals to percents move the decimal mark 2 places to the right and append the % sign.

To convert from percents to decimals, move the decimal mark 2 places to the left.

Sep 28, 2013 | Casio FX-82MS Scientific Calculator

Are you using the right type of logarithms? The calculator provides for two types: common (base 10) and natural (base e).

Could you post an example or two, with the answers you get and the expected answers?

Could you post an example or two, with the answers you get and the expected answers?

Apr 15, 2013 | Casio FX83ES Scientific Calculator

Press SHIFT MODE 8 2 to select the Norm2 display mode.

Be aware that the calculator will switch to scientific notation if the magnitude of the number goes above 10^10 or below 10^-9.

Be aware that the calculator will switch to scientific notation if the magnitude of the number goes above 10^10 or below 10^-9.

Mar 15, 2012 | Casio Office Equipment & Supplies

i am giving the key input with an example..

example-

at 0, value is 300

at 50, value is 270

so how much at 30...

On 991MS,

Go in Reg mode, for doing that : press Menu,Menu, 2

Enter the values as follows,

0,300 and press M+ key on the calci

(Note: there is a "," in between 0 and 300)

then enter the following,

50,270 and press M+ key

now enter the following input exactly as displayed below:

(30) shift 2 > > > 2 =

you will get the answer as 282.

I hope you got it!!!

LOFT!!!

example-

at 0, value is 300

at 50, value is 270

so how much at 30...

On 991MS,

Go in Reg mode, for doing that : press Menu,Menu, 2

Enter the values as follows,

0,300 and press M+ key on the calci

(Note: there is a "," in between 0 and 300)

then enter the following,

50,270 and press M+ key

now enter the following input exactly as displayed below:

(30) shift 2 > > > 2 =

you will get the answer as 282.

I hope you got it!!!

LOFT!!!

Feb 22, 2011 | Casio FX-115ES Scientific Calculator

how to calculate sin 2 theta from fx-991ms calculator

Nov 24, 2010 | Casio FX-115ES Scientific Calculator

The MOD function simply returns the remainder that is left over after dividing the two numbers.

In this case, its possible to see quite easily that only 1×19937 can be taken from 24124 before the remainder is less than 19937. The MOD function is therefore the same as 24124 - 19937 = 4187.

In cases that are less obvious, do the division, ie 24124 ÷ 19937 = 1.210011536[34]

[The last two digits are hidden on the display but still used in subsequent calculations].

Then obtain the fractional part by subtracting 1 to give 0.210011536[34]. Then multiply the answer by 19937 to give 4187. Assuming that you haven't cleared the screen between each section of the calculation, the screen will show "Ans×19937 [=] 4187".

In this case, its possible to see quite easily that only 1×19937 can be taken from 24124 before the remainder is less than 19937. The MOD function is therefore the same as 24124 - 19937 = 4187.

In cases that are less obvious, do the division, ie 24124 ÷ 19937 = 1.210011536[34]

[The last two digits are hidden on the display but still used in subsequent calculations].

Then obtain the fractional part by subtracting 1 to give 0.210011536[34]. Then multiply the answer by 19937 to give 4187. Assuming that you haven't cleared the screen between each section of the calculation, the screen will show "Ans×19937 [=] 4187".

May 10, 2010 | Casio FX-115MS Plus Calculator

there is one button ab/c beneath CALC... if u want to calculate 7 mod 4 then... u should press 7 then ab/c 4 and equal to

1, 3 ,4 which is 4*1=4 and 7-4=3 remainder...

1, 3 ,4 which is 4*1=4 and 7-4=3 remainder...

Jun 29, 2009 | Casio FX-115MS Plus Calculator

In any scientific calculator log2(n) can be calculated with either ln or log function as
follows

Log2(n)= ln(n) / ln(2)

Or

Log2(n)=log(n) / log(2)

both will give nearly the same answers

Log2(n)= ln(n) / ln(2)

Or

Log2(n)=log(n) / log(2)

both will give nearly the same answers

Dec 08, 2007 | Casio FX-300MS Calculator

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