I haven't used any scientific calculator earlier. that way you have explained everything from basics is awesome. Hats off to you for all your hard-work and dedication.
Thanks for a lot the video! I'm gonna take a computer engineering degree for college and I'm sure that these videos will help me throughout my school years. I learned a lot about the Casio calculator because of your videos during my school year that my teachers wasn't able to teach me because of the pandemic and as a visual learner, the manual is hard despite that the scientific calculator that I bought (Casio 991-ex) comes with a free book for every purchase of their product here in the Philippines. I hope that you wouldn't stop making videos about the Casio 991-ex as I found these new product line a nightmare, making me hope that they would still make a new product line with the old layout which I prefer along with it's durability. That's why I bought their product as it sets it apart from other ones such as Texas Instruments and Canon as well as Hewlegt Packard.
This is a brilliant tutorial. I’ve just bought one of these and thought it knew how to use it. But after watching your tutorial I realise I didn’t know half of it. Thanks for this 🙏
pode seguir vídeos sobre a 991EX ou até as mais antigas, o que mais mudou nessa CW foi que muitas funções passaram a estarem em menus sob o botão catalog, ao invés de ter diretamente nos botões
you are welcome. your subscription is stamp of approval on my channel and my video is suggested to more viewers and it will help me. thank you for helping me.
@@madhurbhargava7781 basically, to do the job I want l, I have to get a school degree called Abitur and that's the only calculator allowed in the 3 prep-years and the final 4 tests, that's what I mean
hi, this UI looks finally quite cool and fresh :-) ordered this lovely calc today (fingers crossed the keyb is OKAY, because on 991ex (the ugliest font one), I fixed the keyb response little-bit by some supports for keyb PCB on the edges where it was too flexible, ... more screws nex time, guys ...) ... (and thanks to all your tutorials!) ... on the web exists one article titled "Comparativa entre las Casio fx-82 más actuales" which compares 3 generations of fx-82 up to 2nd ed and its funny how they skipped with keyb layout, really as if it designed little kids :-) ... I understand its not easy to do unified UI with growing functions, but on this 991cw somebody evidently restarted thinking :-) kudos!! and tnx again to U2;
... umm fact is, that I like more the alpha-based keys than those symbolic as pwr/root/frac here ... and would be nice to have things like " . , : ;" somehow "cycled" on single key or so ... its all about usage frequency of most important keys ... ya, ... its quite sad that there isn't some at least ITU-T approach (as on old mobiles, I use it still on android ...) to write complete alphabet/numbers easily, to enter functions by partial names (autocompleted from submenus) ... :-)
also, I play with calcs only for relearning about math (and this approach here IS very clear for this purpose, IMHO, not confusd by searching on keypad, using unified control, umm, I will see ... only personal experience can provide the feeling ...), not for daily usage, where even things like Sharp EL-501T is in fact plain old "TI-style", most known for me for decades :-)
Thank you, much appreciated. The difference between Combinations and Permutations is not about repeat vs non-repeat (i.e. "putting it back" and being able to choose the same thing again), but about whether you care about the order in which things are chosen (Permuations) or not (Combinatioms). If you allow repeats (and care about the order) then the number of possibilities is n^r.
Thank you for your extensive video - I do seem to have an issue with this calculator dividing or multiplying two numbers in floating point - E.g. if I divide 1x10-3/1x10-4, it should equal 10, but on the fx-991CW, I get 1x10-7. Any suggestions? Thanks
Try parenthesis for everything in the numerator end in the denominator. For what this 1x10-3? Is it the 10 to the power of -3? If so is the specific key for that. I have given examples in the video.
Try to Collab this video with any Bangladeshi and make it in bangla translation it will help so many students Of our country and your channel also get some boost pls
You made a Titanic job here. Thank you. If I had to buy a new scientific calculator, a non graphic model, I'd go for this one. Cosmetically I prefer Sharp models but they are incredibly slow in solving integrals. One question: is there anything comparable to this amon Sharp calculators? I wanted to buy a EL-506T but from your old video it seems it's VERY SLOW in calculating definite integrals compared to this and other casio. Thank you
This video was very educated I learnt alot but be any chance can you explain how I could use the calculator on an exam perhaps on CXC mathematics paper 2
Because it's a very huge exam that's coming up in the Caribbean and honestly be able to understand how to use this calculator for the long questions would be a game changer for me the exam is on the 13th so I'll be messaging and hopefully you do a paper
Sir in my casio cw even after pressing shift and = button Its not inserting Equal to symbol ? My calci is new 3 months old and No Sign of Any probelm still ? What to do
I would recommend 991ex if you're used to old settings. 991cw is basically Casio 991ex but with different layout and slightly faster speed, but I think having the menu layout makes the faster computation speed useless as it slows you specially if you use convert a lot for math. The only pro I found useful for this new calculator is sorting statistical data into ascending and descenting order which is useful if your math teacher require you to compute statistics manually with formulas that need to be passed to your teacher. If you have the previous 991ex I would suggest you to stick with that as the only function that is new other than that is math box which isn't that relevant speaking from my perspective as when I took my stats course we already have a table listing numbers of heads and tails and if you need this function you can do this with online apps so all in all the new app isn't that relevant and commonly used on a daily basis in mathematics.
Oh, and another plus is the page scroll key which is good as it makes it easy to school up and down on statistics and spreadsheet data as well as letting you choose the minutes before your scientific calculator auto power off wether it be 15 minutes or 60 minutes.
There is a bug in this calculator, try this: 2-1, EXE, /2, EXE, SHIFT EXE to get 0.25. The correct answer should be 0.5 . The EXE has a wavy equals sign above it which means approximate value (or decimal vale). This means do not rely on SHIFT EXE to convert your fraction into a decimal, it will often give the wrong answer. They should have kept the SD key.
Can you please tell the difference between math input and output? The answer is only coming wrong If we do 3-0.756 and then do -1 it's coming wrong, answer is coming as 0.235
In all honesty, which do you prefer, fx-991EX or fx-991CW? I am in a dilemma because I like the old design and this seems like there is a new learning curve here, so if this is not better than the fx-991 EX I would like to stick to the old model.
If you're not gonna use the new features, which I find useless in mathematics, I would suggest the fx-991EX as the easier function access compensates for the newer models processing speed. Btw, if you're planning to buy the 991ex you gotta make you hurry as I heard that they are already a discontinued model hence explaining the shortage in our country.
@@paulramos6151they did quit production of EX? that's inconceivable, it has been the best calculator for a long time. for me, the EX feels like a native part of my hand and my mind, but CW doesn't seem to surrogate all the features of EX for people who are able to unite with their instrument to the good. a seriously awful situation, I have no idea why Casio has decided to choose that slippery way and surely I'm upset about it
@@dimaminiailo3723 From what I've heard the answer is yes. I already have visited all the stores that Casio has given authority to legitimately sell their product here in the Philippines, however there has been incredibly no luck in finding atleast one. I also checked online sites that's also have been given authorisation, however they all already stopped selling Casio 991ex. I don't know if it is only our country that that discounted the product or it is in effect around the world P.s. I finally found casio 991ex online however they are all imported and has huge price increased.
@@dimaminiailo3723Ex is 100 times better than this. That's the best calculator they made now I feel handicapped with this model and the es plus has even less function
They are the same. There is a new tool for dices... and changed the way to do things, but it basically the same calc. And the EX will be cheaper. Pros of the cw is the design, maybe... But the old style is easier to use. All the functions have been shifted in menus. It makes it slow.
@@MrMarcec85 not only that, this one is missing a few features when compared to the EX models. This is straight up a downgrade from that one. The design and the quality of construction are also superior on the EX models. This one looks and feels cheaper, I've just refunded mine, and I'm sticking to the 991EX.
@@henriquevgf i don't have it. But honestly I thought that quality increased from the ex.... I have both TI30X / TI36 and the 991ex. And TI quality is better. I thought they put efforts in it. I mean.. there is the graphic inequilty solver that can be "useful" for basic algebra... But this is more a high school calc than a device for college or daily job...
@@MrMarcec85 it depends on your ability to use this calc, I solved a lot of nasty equations with it, and it works absolutely great. yes, it's cut out for high school students, but nevertheless, it's a pretty overpowered machine. Shift+Solve forever!
Please tell me how to solve Euler Method on 991 cw . For example, A=0.2(Y+X):B=... I don't find this : two dots in 991 cw. Two dots are seen beside d/dx on 991EX but not 991 cw
my friend I gave you the key but you did not use it. I just searched for "multi statement" and got this page support.casio.com/global/en/calc/manual/fx-570ESPLUS_991ESPLUS_en/basic_calculations/multi_statements.html now let's see if you reply back.
Sır İ wanto say something I research. Calculator wihich calculator can calculate Matrix rows and columuns bigger than 5 like 6x6 do you know sir if avialable this type of calculator can you give me advice thank you 😊🙏
@@cemalbasaran2312In non programmable calculator, you will not find this type of calculation. For more than 4×4 you can use MATLAB software(as your preference) or casio fx CG 50 (upto 70×70) which is a programmable calculator.
Have you used the chapters? this video has chapter and I have explained it in the brginign of video to easily jump to different section. There is section for Solve and Custom function.
... nice night here ... not peeked into manual but you have also "x" key direct under shift, ya? and aren't in mat/vec modes available the vars on the letters over shift? like MatA as Shift+4 (A) ?? ... and mat/vec ops on regular keys +-*/ ?? .. expecting something clever here )) .. maybe only thing missing are that alphanum ITU-T chars with autocomplete by submenu, and perhaps some copy/paste direct keys ... at least expressions can be programmed into two f(x) and g(x) ?? ... to not retype them always? (here also going back to history of calculations can be used? to not retype, but bring back some formula from history?) but would be nice to have also some arbitrary text/exp macros ... umm, thinking loudly ))
does anyone know if i can use this on the ap statistics exam or should i opt for something more powerful? i'm on a budget and i need a cheap graphing calculator.
Question i have a exam coming up and im interested in the 991 cw since it use solar energy and my exam is 2½ hour will it go that long without solar light. What im trying to say it do you have to use solar light while using it or you just use it to charge it and how long will it last for 😢😢
How do you do the random number generator on this calculator, where you can put a range of numbers and the calculator will pick a random number in that range?
Help me please How can i input different values for the x. In the same equation. As i can do it by calc button in the previous version but in this model i can't find it.
