Hi everyone! I'm new to this forum! ..I arrived this site by surfing in the web looking for an answer, I hope to find it here..
I'm about to buy a new scientific calculator, the problem is that I don't know the difference between two models...These are casio Fx 115 ES and casio Fx 991 ES. I downloaded the manuals (they're the same) but....is there any difference between these calculators?.......I hope you can tell me
Well That's all....Thank you very much in advance
Darios
Casio Fx 115 Es Fx 991 Es
Started by
darios
, Nov 07 2005 09:29 PM
28 replies to this topic
#2
Guest_Sergei Frolov_*
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Posted 08 November 2005 - 05:29 AM
fx-991ES basically is a full functions model in the ES serie. In previous models the fx-115MS had not constant table, which was present in the fx-991MS.
Concerning user manual and CASIO web site, fx-115ES and fx-991ES both same models.
But I preffer to buy the fx-991ES instead of fx-115ES. May be, the fx-115ES will contain some undocumended surprize.
Concerning user manual and CASIO web site, fx-115ES and fx-991ES both same models.
But I preffer to buy the fx-991ES instead of fx-115ES. May be, the fx-115ES will contain some undocumended surprize.
#3
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Posted 08 November 2005 - 11:11 PM
hmmm...I see...Thank you very much...And what do you mean by undocumented surprize..?
....Then, another question came up...Is there any "documented" surprize for the the 991 ES??
....Then, another question came up...Is there any "documented" surprize for the the 991 ES??
#4
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Posted 13 November 2005 - 12:07 PM
Hi.
Well, I think he meant that there are hidden features of the 115 ES. If you know what you must type the keyboard to activate these hidden functions, your 115 ES may become 991 ES. That did happen with fx500MS, which can be upgraded to fx570MS or fx991MS by the user.
The "undocumented surprised" may be some fun things on your calculators, such as running words, running number, freez up the calcs.
Well, I think he meant that there are hidden features of the 115 ES. If you know what you must type the keyboard to activate these hidden functions, your 115 ES may become 991 ES. That did happen with fx500MS, which can be upgraded to fx570MS or fx991MS by the user.
The "undocumented surprised" may be some fun things on your calculators, such as running words, running number, freez up the calcs.
#5
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Posted 21 February 2007 - 10:14 PM
Are there any noticable differences between the two models? I'm in Canada so i can't get the fx-991-es, but should i wait and try to get it from Asia, or is the fx-115-es essentially the same thing?
does the fx-115-es have the 40 scientific constants?
hate to sound to repetitive, but i just want to know of any differences between the two models.
does the fx-115-es have the 40 scientific constants?
hate to sound to repetitive, but i just want to know of any differences between the two models.
#6
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Posted 15 November 2007 - 07:28 PM
NORMAL DISTRIBUTION---HELP NEEDED
Can any one help hoe to get the N(z) value of Normal distribution Table for any z. on Fx 991 ES
please revert back oon
Can any one help hoe to get the N(z) value of Normal distribution Table for any z. on Fx 991 ES
please revert back oon
#7
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Posted 16 January 2008 - 03:47 PM
Are there any noticable differences between the two models? I'm in Canada so i can't get the fx-991-es, but should i wait and try to get it from Asia, or is the fx-115-es essentially the same thing?
does the fx-115-es have the 40 scientific constants?
hate to sound to repetitive, but i just want to know of any differences between the two models.
It does have the 40 constants. I just bought it, but I havn't really used it yet. From what I can see though, it a pretty amazing calculator.
#9
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Posted 04 February 2008 - 02:05 AM
What do you mean? The size of the fx-991ES is typical for a scientific calculator.
#10
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Posted 09 June 2008 - 08:19 AM
HELLO!!
HOW CAN I DO WITH CALCULATOR CASIO FX 991 THIS OPERATION??
A--->A^-1 1 2 3
4 5 6
7 8 9
THANK YOU!!
HOW CAN I DO WITH CALCULATOR CASIO FX 991 THIS OPERATION??
A--->A^-1 1 2 3
4 5 6
7 8 9
THANK YOU!!
#11
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Posted 09 June 2008 - 01:27 PM
What do you mean? I don't think you can use those letters as variables, I thought A,B,C,D,E,F were for writing out hex numbers.
#12
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Posted 14 June 2008 - 01:31 PM
I don't know why but they sell them as ?x-991ES in Europe and as ?x-115ES in the USA.Hi everyone! I'm new to this forum! ..I arrived this site by surfing in the web looking for an answer, I hope to find it here..
I'm about to buy a new scientific calculator, the problem is that I don't know the difference between two models...These are casio Fx 115 ES and casio Fx 991 ES. I downloaded the manuals (they're the same) but....is there any difference between these calculators?.......I hope you can tell me
Well That's all....Thank you very much in advance
Darios
As far as I know, the difference is only in name, not in function.
For ---> use 'STO' keyHELLO!!
HOW CAN I DO WITH CALCULATOR CASIO FX 991 THIS OPERATION??
A--->A^-1 1 2 3
4 5 6
7 8 9
THANK YOU!!
For ^ use 'x[little square]' key (left of the log key)
For - use the key with '(-)' on it.
Rest is same.
#13
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Posted 05 August 2008 - 03:36 PM
hi i need help to resolve a matrix equation in fx 115es plase help me
#14
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Posted 07 August 2008 - 04:35 AM
What or which matrix equation ?hi i need help to resolve a matrix equation in fx 115es plase help me
#15
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Posted 11 August 2009 - 11:33 AM
Hi.
Well, I think he meant that there are hidden features of the 115 ES. If you know what you must type the keyboard to activate these hidden functions, your 115 ES may become 991 ES. That did happen with fx500MS, which can be upgraded to fx570MS or fx991MS by the user.
The "undocumented surprised" may be some fun things on your calculators, such as running words, running number, freez up the calcs.
I was just wondering, how exactly can you make running words or numbers in the FX991ES?
#16
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Posted 18 August 2009 - 05:54 PM
NORMAL DISTRIBUTION---HELP NEEDED
Can any one help hoe to get the N(z) value of Normal distribution Table for any z. on Fx 991 ES
please revert back oon
hi =) i'm a student from malaysia. i facing the same problem with u...can u find the solution now??? if can..please teach me also. thanks so much.
#17
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Posted 17 April 2010 - 03:51 PM
I would like to know how to calculate finite differences in Fx-991 MS.
if there is no direct way of finding it, i would appreciate if i get some shortcuts for calculation it.
if there is no direct way of finding it, i would appreciate if i get some shortcuts for calculation it.
#18
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Posted 22 April 2010 - 12:11 AM
hi, wats the difference between the casio fx991es, fx115ms and fx115es??? wat do u mean by 115es not having a constant table? Ive been considering of getting the 115ms just because it's got that clip cover.
#19
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Posted 07 August 2010 - 12:30 PM
I've got the 991ES.
Could anyone tell me how do I solve an equation like
Acos(theta) + Bsin(theta) + C=0
Where A,B,C are constants.
Could anyone tell me how do I solve an equation like
Acos(theta) + Bsin(theta) + C=0
Where A,B,C are constants.
#20
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Posted 14 August 2010 - 02:21 PM
can someone tell me how can i use mod function if there is and if it isnt how can i calculate 123^6 mod 43 and pls dont say to use some wierd alghoritms...im wondering if there is some button or anything that would do mod function
thanks!
thanks!
#21
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Posted 14 August 2010 - 02:22 PM
and ye i forgot to say that i have casio FX-991ES
#22
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Posted 07 September 2010 - 08:22 AM
Has any of you ever tried find square root of a complex number with 991ES?
It's quite intriguing and embarrassing as well to find complex domain so limited.
Also while typing an angle it shows degree marks for all degree, minute and second though it interprets correctly.
It's quite intriguing and embarrassing as well to find complex domain so limited.
Also while typing an angle it shows degree marks for all degree, minute and second though it interprets correctly.
Edited by calC, 07 September 2010 - 08:32 AM.
#23
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Posted 12 November 2010 - 02:30 AM
Hey,
I'm new to this forum.. umm im having trouble with the fx-991. I am unable to perform the calculation of 6x10-11 (6 to the power of -11) minus 5. The answer shows up as 5. I've tried that with any other number in exponential notation and the answer is the answer of whatever number im adding. Can anyone tell me how to fix that.. plz ?!?
I'm new to this forum.. umm im having trouble with the fx-991. I am unable to perform the calculation of 6x10-11 (6 to the power of -11) minus 5. The answer shows up as 5. I've tried that with any other number in exponential notation and the answer is the answer of whatever number im adding. Can anyone tell me how to fix that.. plz ?!?
#24
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Posted 01 February 2011 - 07:08 PM
Hey,
I'm new to this forum.. umm im having trouble with the fx-991. I am unable to perform the calculation of 6x10-11 (6 to the power of -11) minus 5. The answer shows up as 5. I've tried that with any other number in exponential notation and the answer is the answer of whatever number im adding. Can anyone tell me how to fix that.. plz ?!?
Well, the answer would be -4.99999999994 which rounds to -5 on any calculator that displays less than 12 significant digits (the vast majority of calculators). Try 6x10^-2 - 5 and you'll see that the calculator processes this correctly.
#25
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Posted 28 March 2011 - 10:58 PM
hi =) i'm a student from malaysia. i facing the same problem with u...can u find the solution now??? if can..please teach me also. thanks so much.
Read page E-49
In this manual
http://support.casio...S_991ES_Eng.pdf
#26
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Posted 28 March 2011 - 10:59 PM
NORMAL DISTRIBUTION---HELP NEEDED
Can any one help hoe to get the N(z) value of Normal distribution Table for any z. on Fx 991 ES
please revert back oon
Read Page E-49
In this manuall
#27
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Posted 11 April 2011 - 11:50 AM
Read Page E-49
In this manuall
guys even aftr seeing the page i don t get it. how to find normal distribution how do we insert dis x~N(30,4)??
#28
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Posted 05 August 2011 - 12:37 PM
Hii i hav a fx-991ES and i am having trouble in solving equations in it.. can anyone pls help??
#29
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Posted 13 September 2011 - 05:10 AM
Hello, I have a fx-115ES. I have been trying to figure out how to find the derivative. I know that the manual has some brief and ambiguous instructions on how to do so, but it's not that intuitive for me. I was wondering if anyone here knows how to accoplish this.
What i am trying to do is calculate the slope of a tangent line on any given point on the function, instantaneous rate of change, or derivative.
somehow the the calculator must be able to do the following.
1. calculare the and simplify the difference quotient
2. find the limit as h approached 0.
in the top left of the keypad i see the d/dx button (it's a shift to get it to pop up). At that point it as for some fields that i am not familiar with .
Can anyone kindly help?
Many thanks.
What i am trying to do is calculate the slope of a tangent line on any given point on the function, instantaneous rate of change, or derivative.
somehow the the calculator must be able to do the following.
1. calculare the and simplify the difference quotient
2. find the limit as h approached 0.
in the top left of the keypad i see the d/dx button (it's a shift to get it to pop up). At that point it as for some fields that i am not familiar with .
Can anyone kindly help?
Many thanks.
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