Question about Casio FX-300MS Calculator

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Answers in wrong format ?

When i use my calculator to work out 29x 1.4 it gives me the answer of 203/5 how do i get it to stop doing this n give me a straight answer in decimal points ?

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  • 11 Answers

Did you set your calculator's format in to a fraction? If you did, change the calculator's format in to decimal.

Posted on May 11, 2010

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1 Answer

I have Casio Clacuator fx-991MS and it gives wrong answer like


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.

25980185-fw0trqalyrj320gczymiftl4-4-0.jpg

Nov 26, 2015 | Casio Office Equipment & Supplies

1 Answer

Wrong trigonometric answers


The sine of 0.5 radians is about 0.4794, so your calculator seems to be giving you the correct answer in that case.

The sine of 0.5 degrees is about 0.00872, which your calculator may be displaying as something line 8.72 times ten to the negative 3. Look to the far right end of the number: do you see "x10-3" with the "-3" superscripted? In that case, again your calculator is giving you the correct answer.

Sep 10, 2012 | Casio FX-115ES Scientific Calculator

2 Answers

My TI-83 plus seems to give me the wrong answer if I type in the problem: 1400/(60*24) The answer should be 1, but I keep getting .9722222. I don't understand why it keeps giving me the wrong...


That is the correct answer. 60 multiplied by 24 is 1440. 1400 divided by 1440 is a number slightly smaller than 1.

Are you sure the problem isn't 1440/(60*24)?

Jun 22, 2011 | Texas Instruments TI-83 Plus Calculator

3 Answers

TI89 is giving wrong answer for the integral of sec(x). Please help. It gives the answer as: ln[ |cos(x) / (sin(x)-1)| ] when it should be ln[ |(sin(x)-1) / cos(x)| ]. Why is it giving the wrong...


Hi danagasta,

If my last instructions did not work then you need to reset your RAM. You are missing the negative sign and, I have no idea where you got the absolute value inside the brackets.
Yes, the absolute value are used in books and, on integral tables but, I can asure you that the Ti 89 should not have produce them in this answer.

I'll stand behind that In( -cos(x) / (sin(x)-1)) is the correct answer. You can go ahead and simplify after the calculation to get the answer you want but, that is the good answer that Ti 89 is going to give you for the integral of sec(x).

Errors that do not match the suspected, I am pretty sure that Texas Instruments would have you clear the RAM. I do not like resetting the RAM but, I could not find the cause to why you got the answer you did. And so far no other expert has produced a solution to convince me otherwise.

I was not able to come up with any of the 3 answers MiB8888 did on my Ti 89. I am not saying that they are not good answers, they are book and integral tables answers. You are not going to get them on the Ti 89.

Jan 04, 2011 | Texas Instruments TI-89 Calculator

1 Answer

Wrong answer produced in sin / cos problems?


5sin(x)+1 = 0 is the equation you want to solve?
so
5sin(x) = -1
sin(x) = -(1/5)
arcsin( sin(x) ) = arcsin( -(1/5) )
x = -.201 (radians)
x = -11.5369 (degrees)

Jun 04, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

TI-89 decimal to fraction


Here is what you do:

1) Press the Mode button.
2) Scroll down the list that appears until you find "Exact/Approx".
3) Change the setting for "Exact/Approx" to Exact.
4) Press enter to save the settings change.

You have three possible settings for "Exact/Approx":
1) Auto - The calculator will try to determine the best format.
2) Exact - The calculator will always give the answer in fraction form.
3) Approximate - The calculator will always give the answer in decimal form.

Nov 15, 2009 | Texas Instruments TI-89 Calculator

1 Answer

My log functions are wrong


Hello,
It would help to know what you are trying to do or at least in what way you answers are wrong. I will do my best to guess right.

Ex: if you enter log(25) it gives you 2*log(5) and if you enter log(5) it echoes the same thing. If that is waht you get, it is easy to fix.
Press the Main icon at the bottom of the screen to open the calculator run screen. Unfold the first Menu to the left of Edit. Press Settings (first submenu) Press the/arrow and select Setup item, then Basic Format. Under Common tab you have the different formats: folder, display, angle, and Advanced. Put a check mark in the box to the left of Decimal Calculation an press Set to save configuration.

The other possibility is that you actived the 2D keyboard which gives you access to the 2d Function templates. You use these to calculate the log in arbitrary bases. Functions on this keyboard have a dark rectangle. If that is the source of your problem, use the stylus to select the mth keyboard.
Hope it helps.

Oct 10, 2009 | Casio ClassPad 300 Calculator

2 Answers

Hi, I have a Casio calculator fx-991MS giving me wrong answers!


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.

Oct 01, 2009 | Casio FX-115ES Scientific Calculator

2 Answers

My TI-89 cant do simple calculations.


You have to set how the calculator handles numbers. To do this follow these steps: 1. Press the 'MODE' button. This brings up the calculator's main settings page. 2. Scroll down until you reach a field titled 'Exact/Approx...'. This is the setting for how the calculator handles numbers, whether it will show the exact answer (which is usually in fraction format) or whether it will show an approximate number (which will be in decimal format). 3. Press the right arrow which will bring up the options for that setting. You must now choose between three ways of handling numbers: -'1:AUTO' will determine which type of answer the calculator will give based on what numbers you want it to calculate (e.g. if you want an answer in decimal format just add a decimal somewhere in your problem). -'2:EXACT' will automatically display all answers in either whole number format or in fraction format. -'3:APPROXIMATE' will automatically display all answers in decimal format. 4. After you have selected one of those options press enter one more time to get out of the 'MODE' dialogue and return to the 'HOME' screen. Now try a problem and see what happens. Personally I like using 'AUTO' because then I don't have to keep returning to 'MODE' when I want either or. Hope this helped, I had the same problem when I first started using the TI-89.

Sep 18, 2007 | Texas Instruments TI-89 Calculator

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