32 Cool Features of Casio fx-991EX Classwiz Scientific Calculator

Business and Financial Mathematics Tutorials-
goo.gl/KGkCDW
My Casio Scientific Calculator Tutorials-
goo.gl/uiTDQS
I'm Sujoy and today I'll tell you 32 cool features of Casio fx-991EX Classwiz Scientific Calculator.
Topics Explained-
1. Fractions Calculations on Casio fx-991EX Classwiz
a. Using fraction template
b. Fractions to decimal conversion
c. Using Mixed fractions template
d. Compound fractions to mixed fractions conversion
2. Expression Calculation on Casio fx-991EX Classwiz
3. Trigonometric calculations (Sin, Cos, Tan, Sin^-1, Cos^-1, Tan^-1)
4. Percentage Calculations on Casio fx-991EX Classwiz
5. Sexagesimal (Hour,Minute,Second) Calculation on Casio fx-991EX Classwiz
6. CALC Feature on Casio fx-991EX Classwiz
7. SOLVE Feature on Casio fx-991EX Classwiz
8. Random Number Generator (Ran# and RanInt#)
9. Integration on Casio fx-991EX Classwiz
10. Differentiation and Derivative on Casio fx-991EX Classwiz
11. Factorial Calculations on Casio fx-991EX Classwiz
12. Permutation Calculations on Casio fx-991EX Classwiz
13. Combination Calculations on Casio fx-991EX Classwiz
14. Unit Converter on Casio fx-991EX Classwiz
15. Scientific Constants on Casio fx-991EX Classwiz
16. Square Root, Cube Root Calculations on Casio fx-991EX Classwiz
17. N-th Root Calculations on Casio fx-991EX Classwiz
18. Using Variables on Casio fx-991EX Classwiz
19. Writing names on on Casio fx-991EX Classwiz
20. Multi-statement calculations on Casio fx-991EX Classwiz
e. Generate Fibonacci Series on calculator
21. Adjusting display contrast on Casio fx-991EX Classwiz
22. Polar to Rectangular conversion on Casio fx-991EX Classwiz
23. Rectangular to Polar conversion on Casio fx-991EX Classwiz
24. Summation - Finding sums of squares on Casio fx-991EX Classwiz
25. Natural logarithm ln and e calculation on Casio fx-991EX Classwiz
26. Absolute value calculations on on Casio fx-991EX Classwiz
27. Answer variable - Arithmetic series, Geometric series, and Power series on Casio fx-991EX Classwiz
28. M+ button usage on Casio fx-991EX Classwiz
29. How to Reset, Clear all memory of Casio fx-991EX Classwiz Calculator
30. Reciprocal and inverse of number on Casio fx-991EX Classwiz
31. Log-base N calculations on Casio fx-991EX Classwiz
32. Antilog calculations on Casio fx-991EX Classwiz
That's it for now! How is the video? Let me know.
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[@januszsowa805]

I've got this calculator couple months ago and I have to say that it is the best one I ever used - I'm using it mostly for statistic and it comes very handy. Very good video Sujoy - picked up couple tricks

[@sujoy70]

+Janusz Sowa Watch my another vid- kzbin.info/www/bejne/p6fUpaCQlK1oZsk Thanks! Subscribe to my KZbin channel so that when I upload a new video,you get notified. If you like any of my videos,I'd request you to please like & share it. Because sharing is caring :-)

[@farhannoor3935]

can you access hyperbolic functions on this calculator as in the previous ones?

[@Crazytesseract]

@@farhannoor3935 Yes. Press [OPTN] and then 1.

[@bukkaharshvardhan]

The multistatement operator is a huge time saver in numerical methods problems... Especially finding roots using regula-falsi or newton-raphson method.

[@bythetimeyoufinishedreadin9083]

Hey you dont have to do "alpha x", there's already an x button on the top right

[@u_u9286]

LEGEND I didn’t now that

[@noahbesage6765]

@@u_u9286 ,,

[@turakhossain]

WOW 🤯

[@TheClinchMagazine]

This dude's channel helped me getting through toughest semesters during my college year without any problem. Thanks man.

[@djokotriono7787]

Thanks, Sujoy. I've busted my beloved 9750 and now my daughter is entering calculator age. Definitely getting this one

[@bukkaharshvardhan]

Thank you so very much for these videos. You're a life saver Sujoy!

[@abdulwajid6677]

I bought this calculator without knowing anything about it,at starting i didn't know why my teacher recommend me this and now I know its everything..... Just wow...

[@Culer8605]

When you cmnted what are you doing

[@keithrobles8607]

hi sujoy, do you have a tutorial about finding the height and length of a trapezoid using calculator?using STAT then A+Bx

[@abhilashasharma4560]

while we are doing I.F value e power integration we have to do right for that there wil be no upper nd lower limit but calci it is asking to put those values how to slow it.

[@NishilS]

This video is very helpful. Appreciate it! Liked and Subscribed

[@aariziqubal3660]

Thanks for this video, it is very helpful.

[@allamaprabhuani]

Hey Sujoy, I am looking for a calculator that can store and compute 12 matrices of dim 4x4.. Which calculator should I go for?

[@shashankda2002]

Very useful tricks and tips. Thank you ☺️

[@mohdtazammul4699]

I want to calculate the differentiation in equation form...which calculator does it allow?

[@bvivan1690]

<a href="#" class="seekto" data-time="660">11:00</a> Worth knowing, ty!

[@maheshkumars2593]

Hello Sujoy,Iam using Casio fx-991EX Classwiz Scientific Calculator and performing Binomial Distribution calculation by choosing "Binomial PD" and fed the data as mentioned below:-X =4N = 7P = 0.9Iam getting the result as 2.296 rather than .02296Kindly assist on how to get the probability between 0-1 range rather than getting more than 1.

[@shrinivasrao1734]

Thanks a ton!

[@MAfzal-bo4ng]

where to find option button in vpam fx-991es compare to classwiz fx-991ex? kindly help me

[@Drogba402]

Does it sketch a graph of a function using the QR code?

[@pinehteshapple3666]

Thanks for uploading this kinda helping vedio this helped me a lot in my o levels exams

[@maheshwarbanuk4389]

Very useful !!

[@moganash6992]

great job man

[@sheet-son]

Do you know how to do inverse square root of a matrix

[@EricBrunoTV]

This is a good video. I was looking for how to calculate this. (x^2-3x)^3 so I can earn time during exam. Thank you

[@Navniit_Patel]

- Thank Yuh Sir For The Fantabulous Video

[@ibrahimkhaled4058]

Please is this calc. Can evaluate triple integral ?

[@arnendo9304]

Hello, is on button by default shorter ??

[@Bastimon]

Great video, that little calculator has some really useful features

[@sujoy70]

+Bastimon Thanks! Check my other vid- 7 Exclusive Cool Features Casio fx-991EX Classwiz kzbin.info/www/bejne/p6fUpaCQlK1oZsk Casio fx-991EX Unboxing and Quick Review- kzbin.info/www/bejne/d5_PgYODhrySopI

[@kcravikumar5825]

Is there any difference in them...bcuz I don't have latest version

[@fakrulislam5404]

THANKS A LOT

[@satviksharma1146]

Awesome video loved it . Thanks a lot. Subscribed:p

[@fo0xm898]

no

[@sankalplohakare9661]

What is the use of white calculator on the right?

[@nibirrahman9120]

How to use hyp function in it?

[@abyazkarim6755]

Excellent video

[@shaukatali800]

Thanks a lot sir

[@ceeday8141]

How do you get simplest square roots

[@tygerkhaja4343]

Very helpful

[@delwarhossain-rd1zo]

Sir I need to know how to do vector and matrix maths on this calculator (fx-991 EX)?

[@Crazytesseract]

Please see other videos of the author. Or read the manual.

[@narayanamandada9054]

What is updated version of the calculator please reply it was most important to me please

[@theodoresweger4948]

Very Good, Thanks

[@sujoy70]

Thanks! Kindly subscribe.

[@Ramanbhukania]

Hi, I would like to know if I want to sum 20 numers simaltenously squreroot the number how to do that in FX991EX

[@sujoy70]

You can do it in table mode. Or in Spreadsheet more.

[@azozmustafa5378]

How do we find indefinite integration in fx 991ex

[@Machettent]

very helpful & easy to understand. However I would have loved to show us how to calculate the greatest common divisor& LCM. Much obliged

[@sujoy70]

Thanks! Hope you subscribed and liked the video :-) Please check my 3 GCD/LCM vids here- How To Find LCM and GCF/GCD on Any Normal 8-Digit Basic Desktop Calculator kzbin.info/www/bejne/Z37Ck4huocyNj68 GCF/GCD/HCF of 3 Numbers Casio fx-991ES kzbin.info/www/bejne/bYXHp2yHr6iYnZo GCD/GCF/HCF of 3 Numbers Casio fx-82MS kzbin.info/www/bejne/nJ-lfmqapsissNE

[@Machettent]

but how in the fx-991 EX. Idon't see any button for gcd/lcm

[@Crazytesseract]

@@Machettent for that you need to get the fx-991DE X, the German version.

[@MahfuzShaon]

Good video . Its an awesome calculator . Got it a week ago

[@sujoy70]

+Mahfuz Shaon Thanks! Subscribe to my KZbin channel so that when I upload a new video,you get notified. If you like any of my videos,I'd request you to please like & share it. Because sharing is caring :-) Watch another 991EX vid here- kzbin.info/www/bejne/p6fUpaCQlK1oZsk

[@khaosthesniper8321]

<a href="#" class="seekto" data-time="197">3:17</a> isnt there another x sign under ON

[@neilkanagaratnam7445]

Excellent

[@Machettent]

hi sir, do you have video regarding casio cp 400?

[@sujoy70]

No Sir!

[@arcticblade4243]

get a casio fx 991ex its the best!!!!!!!!!

[@TheRealBleach]

@@arcticblade4243 The casio cp400 is the best

[@TheSrijith2]

Hi there.. is it possible to format the columns or rows of spreadsheet as in excel? Like if I want to calculate the duration which is difference between start and finish date. So I want to know how to enter the dates in date format

[@sujoy70]

I'm afraid it's not possible.

[@TheSrijith2]

Sujoy Krishna Das thank you

[@sadiasi152]

Thanksss

[@akashparashar3348]

I want to do a series calcultions and want to find cumulative sum how can i do that?

[@sujoy70]

Have you checked the 'Summation' feature at 13:34 minutes? If that didn't help, write down your calculation below which you want to perform.

[@arunakitchen4781]

Thanks bro

[@divamenghrajani9932]

how to solve comound interest on fx 991ex plss do a video

[@pawandc7252]

How can we check if its a original one?

[@rafaellopes2053]

<a href="#" class="seekto" data-time="843">14:03</a> nice

[@haSarudeen]

Brother i need a best CALC for saving formulas.... Can u suggest one..

[@sujoy70]

Well these calculators doesn't support saving formula, you need Graphing Calculator for that. Check my this video to know more- kzbin.info/www/bejne/oaW9fKtrnb9neLs

[@nikshithajakkula7622]

How to find e to the power something value in this calculator

[@sergiomartinezmurillo4938]

can you show me how to do de interpolation, please

[@ianmark321]

same as 991es plus

[@prathmesh3128]

Factorials ka symbols kha par haii

[@humdaanmirza6678]

Help me :in this calculator when i find inverse of the matrix then u get ans only in decimal ,no way i can find it in fractions. Teied changing all modes.

[@hairyputter5363]

Try resetting the calculator to initial mode then MathI/MathO. Maybe that'll help

[@malaikaa.raheem2745]

When i am finding values of trignometric functions they keep appearing in decimal how can i find it in simple whole number pllzzz anyone do tell me

[@grabbani3131]

how can i note my sum in it ???is there any solution??????

[@qp7to7]

Can you please tell me how to calculate the dates by this

[@Crazytesseract]

You can't directly. You have to use Casio warehouse calculator used in big shops.

[@littlelully7426]

can help me to remove all mode and keeping only in D?

[@chowdhuryrizvi4257]

Just press shift and the press 9 and then press 3: Initialize all . Doing this it will remove all the modes and go bank to default

[@naseerkhan-hk8od]

How to save number in calcolater fx-991ARX

[@tanveerahmad9975]

Sir how can I change the mode to normal plzzzz help

[@evolve2survive324]

for a engineering student, should i buy a ti 36x pro or casio fx-991ex ?

[@sujoy70]

evolve 2survive Features wise fx-991EX without doubt.

[@evolve2survive324]

@@sujoy70 what about ease of use and functionality ?

[@ratansarker8233]

Is it allowed to be taken in exams?

[@kurtteo69]

At <a href="#" class="seekto" data-time="273">4:33</a> mine says syntax error. How do you get that display?

[@sujoy70]

Press SHIFT+CALC, not = button. Thanks! Don't forget to subscribe and share.

[@emilyyates4177]

Does this calculator still have the ability to input recurring decimals?

[@u_u9286]

Yes just spam the decibel

[@Crazytesseract]

No. You need fx-991DE X.

[@asifahmed-rb7ny]

How about QR option?

[@LaynusST]

Do you have a fx 82ex? There is not a single video about it and i bought this calculator beacuse there werent any 991ex or 570ex! If you do, ill thank you for life!

[@Crazytesseract]

Arey, it has less features. But operation is almost same like. Means na, you do same type button pressing. But all function you not getting. Understood na? No, then ok.

[@smartworld612]

what is initialize all ,what is its uses plz tell me

[@moniiiiiiiiii]

when you are replacing the battery or is a new user

[@micahmorbs]

Please teach us how to interpolate using fx-991 EX.

[@ianmark321]

the same as 991es plus

[@RajeshKumar_9688]

sir, in 991EX , please upload matrix calculation, finding eigen value, eigen vector, all stuff related to matrix. Also in 991EX, I need simpson, newton, gordan, siedal etc alll on "fx-991eX". I need because these are in UPSC syllabus. pls share and thanks

[@sujoy70]

Everything is already uploaded using 991es, which is similar to EX. Request you to watch them. My Numerical Methods Tutorials- goo.gl/ZxFOj2 Matrix Algebra- goo.gl/4gvpeC Casio Scientific Calculator Tutorials- goo.gl/uiTDQS

[@danielnguyen1775]

Thanks

[@k9N7p]

Hello brother ?? what's the price in india ?? One you bought for(FX991EX) Here in Nepal ? Can we get it ?? The price of ES991Plus differed heavily in market that from online sources ??

[@sujoy70]

Around 1150. No I've not been to Nepal. Prices you can compare yourself.

[@k9N7p]

+Sujoy Krishna Das and what about forthcoming calculators ??

[@haggerd5007]

I just want to know if Casio calculator Fx-991ex can draw graph or not. Plz reply

[@pedromeneses5661]

It's not a graphic calculator, it's a scientific calculator, you need to pay top dollar for a graphic calculator. Although this calculator generates a QR code which your phone can then graph the functions out for ya with the CASIO app

[@haggerd5007]

Man O' War Thank you 👍

[@nirajanshrestha682]

I have casino fx-991ex CLASSWIZ but how can I found original or duplicate please pls give me hints

[@asifmahmoud126]

Casio*

[@ArpanChoudhari]

<a href="#" class="seekto" data-time="236">3:56</a> saved me I used to values manually there

[@ajroxie8921]

Is it allowed to diploma

[@trishpadin3789]

Can i see the Casio fx 991 Ex classwiz more closer?

[@sujoy70]

Yes, watch the video in full screen :-)

[@devdattamanjrekar3655]

@@sujoy70 👌😄

[@sarahpaul3293]

when trying to calculate e^sin(√(2)) , i keep getting 1.024 instead of 2.7. How do I rectify this error?

[@ajeyaacharya3504]

make angle unit as radian not decimal and u get the ans 2.7. Done!!!!!!!!!!!!!!!!!!!!

[@rahmashamail]

Are u doin the SAT barrons book cos I just did this same question a few min ago

[@Crazytesseract]

@@ajeyaacharya3504Note: radians not degrees, (not decimal).

[@shaniceswain6374]

How do I get to the regular calculator??

[@sujoy70]

Press MODE/SETUP then press 1

[@YatRatoLabsnaa]

Is it allowed in B.Sc ??

[@clodo-viu8050]

2000=1000(1+9%)x syntax erro... alguem me ajuda

[@Aussie_Engineer]

which calculator should I buy? 991ES or 991EX

[@sujoy70]

Definitely 991EX. check- kzbin.info/www/bejne/p6fUpaCQlK1oZsk

[@Aussie_Engineer]

what about texas instrument? i've heard a lot about them

[@sujoy70]

Yes you can. If you want. But they are not so user friendly compared to casio. And the features provided by 991EX, in same price range no other calc provides.

[@Crazytesseract]

@@Aussie_Engineer It's your choice. If you're uses to TI layout you may prefer TI. But for features, Casio is preferable. But later on don't blame me. You can buy SwissMicros DM42, an excellent, rugged calculator (almost like nothing will happen). Texas ia like ant in front of it. But then you should know RPN. Understood na? Ab chal so ja.

[@ashiqurrahman3968]

Nice

[@hulk8889]

Does it calculate inverse of 4 x4 matriz?

[@iBuyNewStuff]

yes it can. press your matrix, then pres the x^-1 button.

[@smartworld612]

yes

[@abhirupbasu3761]

Yes

[@micchang3262]

how do you add a remainder?

[@sujoy70]

Hi, have you subscribed?

[@Mr_AAditya]

After watching ur video i bought this calculator but i am still wonder is it allowed in state level exam?

[@mujahidaziz4662]

G.Aditya likely yes

[@edmund8954]

<a href="#" class="seekto" data-time="272">4:32</a> What does L+R mean?

[@sujoy70]

Left-Right=0, means for x=8.043.., left & right side of the equation are same, that's equation is solved, as we are using the SOLVE feature.

[@oceansweetboy3450]

Sir where is hypherbolic function is calculator 991 ex??

[@ianmark321]

shift setup bottom option hyperbolic ....

[@moniiiiiiiiii]

OPTN ^(UP button) 1

[@shivmahakaal5894]

Sir isme matrix ka inverse kese nikal skte h please bataiye na?

[@1ultimatewwefan]

kzbin.info/www/bejne/mHeTY2emi9uMhrM Ye dekho, isme batata hei

[@user-jj2gv9pm2q]

Sir I have got a prblm with this Casio it's display is gng of under shade it's only working when we're on the outside of the home how to fix it if anybody know this pls hlp me😢

[@sujoy70]

If display is dark / bright in sunlight, but dim inside home, then your battery is low. Please change it with new LR44 battery. ~50 around price. Don't forget to like share subscribe!

[@thstahmid]

Almost same features are present in casio fx 991 es plus 🙄😛😛

[@noahwolf5089]

is 991 Ex programmable calculator reply ????

[@Crazytesseract]

Not.

[@noahwolf5089]

@@Crazytesseract lol after 1 yrs i got reply from someone 😂

[@nikhila6558]

Hlo iam not getting percentage could u pls hlp me

[@girijais2488]

Sir this calculator only giving fraction ,how to change this plx reply

[@ifaa83]

kzbin.info/www/bejne/q3mUXouYnayMfas

[@wolffanderson7629]

you can use the SD function which will change it from fraction to decimal

[@satviksharma1146]

Is it allowed in engineering exams in colleges?

[@lesserspottedmugwump.363]

It’s not allowed in uk universities, if that helps? The quadratic and integration solver seem to be the problem.

[@nasusgg8274]

It is allowed in Arabic universities only in engineering subjects not math

[@funbusters9605]

Can you say how to write alphabets in 991ex

[@sujoy70]

Fun Busters Already explained in this video, check feature number 19.

[@funbusters9605]

@@sujoy70 I want A to z

[@sujoy70]

Fun Busters Not possible on this model. Better get fx-9860gII.

[@luh.breezy3558]

For full review of casio fx 991 ex classwiz + also game you can play on this calculator + more, Please checkout my friend's video : kzbin.info/www/bejne/pnazhZWsfJx_gac like and subscribe if it helps☺️👍