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Scott Collins
เข้าร่วมเมื่อ 8 ก.ย. 2013
CASIO fx-991CW Classwiz - Beware of its flawed Scientific Notation implementation
I watched one of Edward Shore's videos and in the comments was someone (kudos to @MartinBeerbom ) mentioning this very issue. I made a mental note that I wanted to investigate this. Later I was using the calculator to do a calculation where I expected a number less than zero, but ended up with a huge number. I then realized what was going on and that this was the very issue the commenter had brought up. I am disappointed that CASIO would release a calculator with this sort of flaw. Hopefully, it is something they will correct at some point.
Here's @MartinBeerbom well written comment:
"One of the most problematic for me (a calculator user for over 40 years; if you only learned this one, things may vary) is the changed behavior of the "x10^n" button, which replaces the "E" button. In the past (that is, ALL calculators made in the past who had this functionality) this button was used to enter an exponent in scientific notation which was part of the number you entered. Now it's actually a product, with the exponent of the ten NOT part of the number. (Entering "1/3x10 3" gave in the past 1/3000, entering "1/3x10³" now gives 1000/3. The labeling printed on the button remains almost identical.) This makes many calculations in physics more clunky and requires more attention to details like extra brackets."
Here's @MartinBeerbom well written comment:
"One of the most problematic for me (a calculator user for over 40 years; if you only learned this one, things may vary) is the changed behavior of the "x10^n" button, which replaces the "E" button. In the past (that is, ALL calculators made in the past who had this functionality) this button was used to enter an exponent in scientific notation which was part of the number you entered. Now it's actually a product, with the exponent of the ten NOT part of the number. (Entering "1/3x10 3" gave in the past 1/3000, entering "1/3x10³" now gives 1000/3. The labeling printed on the button remains almost identical.) This makes many calculations in physics more clunky and requires more attention to details like extra brackets."
มุมมอง: 612
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CASIO fx-991CW CLASSWIZ - Working with logs
มุมมอง 7182 หลายเดือนก่อน
Using the CASIO fx-991CW CLASSWIZ to solve a variety of log problems
CASIO fx-991CW CLASSWIZ - Degrees Minutes Seconds to/from Decimal Degrees
มุมมอง 1.2K2 หลายเดือนก่อน
Converting Degrees Minutes Seconds to/from Decimal Degrees using the CASIO fx-991CW CLASSWIZ, followed by the same calculations using the CASIO fx-115ES PLUS 2nd Edition.
CASIO fx-991CW CLASSWIZ - Using SOLVER to solve an equation for x
มุมมอง 1.5K2 หลายเดือนก่อน
Short video explaining how to use the SOLVER function on the CASIO fx-991CW CLASSWIZ to solve an equation for x, followed by how the same thing is done on the CASIO fx-991EX (the model that the fx-991CW replaced).
CASIO fx-991CW CLASSWIZ - Unboxing and Initial Impression
มุมมอง 9002 หลายเดือนก่อน
I am late to the party on this calculator, but was curious enough to pick one up and thought I would share some thoughts and make a few videos about it.
CASIO fx-991CW CLASSWIZ - Additional Thoughts and Speed Test
มุมมอง 9482 หลายเดือนก่อน
Exploring the fx-991CW CLASSWIZ a bit and making comparisons with the fx-115ES PLUS 2nd Edition and the fx-991EX CLASSWIZ
TI-30X Pro MathPrint vs TI-36X Pro -- The 30X is significantly better, but NOT sold in the USA
มุมมอง 29K2 ปีที่แล้ว
A comparison of some key improvements that the TI-30X Pro MathPrint offers over the TI-36X Pro. I had to order the TI-30X Pro MathPrint from the UK. It was around $45 including the shipping. I don't get why TI does not introduce this as a TI-36X Pro Version 2 in the US. Perhaps the price point would be too high? Not sure. I purchased the calculator from Rarewaves.com out of London, England: www...
Sine, Cosine, Tangent and SOH-CAH-TOA -- Trig Ratio Names
มุมมอง 2692 ปีที่แล้ว
Just a short video about what I consider the sub-optimal (to be polite) naming of the six trigonometric ratios. We may be more than 500 years late to the naming convention, but perhaps they will still hear us out. Not my typical calculator video, but hopefully a few of you out there will appreciate something different.
1 kilosubscriber celebration with the mighty hp 28S
มุมมอง 4.7K2 ปีที่แล้ว
Thought it would be appropriate to do another video of my hp 28S the calculator that officially kicked off my deep appreciation of these amazing little machines called calculators
Solving Definite Integral with unknown upper bound with the hp Prime solver (v2)
มุมมอง 6K2 ปีที่แล้ว
UPDATE: According to my latest info (Thank You, Craig Lewis), the hp Prime bug has been corrected, and the calculator no longer has a problem parsing the information correctly. In a previous video I showed the TI-36X Pro solving this same problem and then attempted (but failed) to show the hp Prime solving it. In this video we have overcome the obstacle (turns out it is a known bug) and used th...
Using the TI-36X Pro solver to find the unknown upper bound of a definite integral
มุมมอง 3.3K2 ปีที่แล้ว
Something very impressive that the TI-36X Pro and the CASIO fx-991EX are able to do: find the unknown upper bound of a definite integral required to provide a desired result (i.e. area under the curve). What is not impressive (well, I guess it actually is impressive, but not in a good way) is how long it takes the TI-36X Pro to do this 3 minutes and 41 seconds! But, it did figure it out!
Exact Square Root -- Advantage, CASIO
มุมมอง 10K2 ปีที่แล้ว
This is one of those little things that might matter to you. In my experience, the CASIO does a better job finding exact answers to square root problems.
Calculators - The Need for Speed
มุมมอง 5K2 ปีที่แล้ว
A viewer commented on the vast difference in speed between the TI-36X Pro and the CASIO fx-991EX it's something I am very aware of, but not something that is much of a factor in terms of the way I typically use the calculator. I thought he made a good point and that I would make a short video showing just how different the speed is between a variety of calculators when estimating a definite int...
Exploring a Scientific Notation Curiosity -- What's Going On Here?
มุมมอง 8783 ปีที่แล้ว
Exploring a Scientific Notation Curiosity What's Going On Here?
The SwissMicros DM42 rocks. But should it?
มุมมอง 5K3 ปีที่แล้ว
The SwissMicros DM42 rocks. But should it?
DM42 - 4 programs to do what TI-36X Pro has built-in
มุมมอง 8K3 ปีที่แล้ว
DM42 - 4 programs to do what TI-36X Pro has built-in
TI-36X Pro vs CASIO fx-991EX - Notable Differences
มุมมอง 38K3 ปีที่แล้ว
TI-36X Pro vs CASIO fx-991EX - Notable Differences
Strange Cube Root on the DM42 and a Work-around
มุมมอง 12K3 ปีที่แล้ว
Strange Cube Root on the DM42 and a Work-around
DM42 (SwissMicros) - Solving Various Engineering Problems
มุมมอง 25K4 ปีที่แล้ว
DM42 (SwissMicros) - Solving Various Engineering Problems
HP48GX - Custom Menu (CST) Setup and Use
มุมมอง 7K4 ปีที่แล้ว
HP48GX - Custom Menu (CST) Setup and Use
CASIO fx-115ES PLUS 2nd edition vs CASIO fx-991EX CLASSWIZ
มุมมอง 103K4 ปีที่แล้ว
CASIO fx-115ES PLUS 2nd edition vs CASIO fx-991EX CLASSWIZ
fx-115ES PLUS 2nd edition - A Brief Overview
มุมมอง 36K4 ปีที่แล้ว
fx-115ES PLUS 2nd edition - A Brief Overview
Custom Variable Names in Solve App via "User Variables"
มุมมอง 5K4 ปีที่แล้ว
Custom Variable Names in Solve App via "User Variables"
Round 4 of 4 - Algebraic vs RPN - Contrived
มุมมอง 1.6K4 ปีที่แล้ว
Round 4 of 4 - Algebraic vs RPN - Contrived
Thank you so much sir❤️
You are welcome.
Brilliant Love ur videos ❤❤🎉🎉
Thank you!
TY
You are welcome
thank uu 🎉
Happy it was helpful.
Thanks a lot for this, you introduced me to math print which all this semester I did not know existed this literally feels life changing not having to make it all look like a mess trying to put my fractions and square roots 😭
MathPrint rocks. Glad I helped you find out about it. Thanks for letting me know.
Me: 5X-7=(‐3X+9) X= 2 L-R= 0
That is the correct result. You should not need the parentheses -- did you find that they were necessary? I'm curious.
Can confirm, even with overclocking the Sharp is slow with integrals.
Wow.. Very nice! Thanks for the RREF tip. Your right, use it once and it's your new best friend.
Glad you benefited and appreciate you letting me know.
thank you Scott. your videos help me so much, much love from Saudi. شكرا لك من اعماق قلبي
I appreciate you letting me know you found it helpful -- always fun to hear from people around the world like Saudi. Take care.
I am using for 8th class this function o off calculator
As a former teacher I would say if math is a struggle for you then using this feature of the calculator will definitely help you, but if you enjoy math and find that it generally makes sense then please be sure to practice doing these sorts of problems without your calculator since it will help you in future math. Best wishes to you.
Do you have it in Casio fx-991CW version?
I do not have a video for this yet. It is likely very similar to the fx-991EX though.
Can use with Casio fx-991CW?
Here's a video showing how to do this on the fx-991CW (I think this is what you are asking): th-cam.com/video/n2DOocN61f4/w-d-xo.html
@@scottcollins7513 Thank You,👍
How I can do the other way around. With symbol degree,' , " ? I expecting when I pressing shifts and + , to change to degree symbol, ' , " ? How to do fission, photon and fusion formulas?
What calculator model are you using? I'm confused about the Shift and + since my calculator shows that as changing the contrast of the screen. Also, what is an example of one of the formulas?
@@scottcollins7513 I have Casio fx-991CW.
@@scottcollins7513 CASIO fx-991CW CLASSWIZ, I was trying to calculate the Degrees Minutes and Minutes to degrees. I do not know how to do it, right.
@@scottcollins7513 I am using the CASIO fx-991CW CLASSWIZ, I able to use understand of changing the decimal to minute. How i can calculate photons and light years?
HP 48 may be slower, with less apps but way easier to use (less key strokes for all functions). I have a HP Prime and it sits gathering dust. It is so easy to do either Base or Unit conversion on the HP48. There are so many key entries for simple unit or base conversion, it is just a joke!
The Prime lacked elegance in my view. Great technology, but lacks the cohesiveness of the 28/48 calculators. That might just be b/c I am the wrong generation for it. Sounds like your experience is similar. Thanks for weighing in on the conversation.
@@scottcollins7513 The Prime is a Windows GUI math app masquerading as a calculator on a small screen . There is no reason for a calculator to have a drop down menu with multiple layers to call a function. Prime fails to be a decent math app (for that I can use either MatLab or Octave) or a good calculator. As a calculator hp48 reigns supreme with its simplicity and elegance of layout.
It would be more accurate to say the Sharp solves for zero. As such instead of typing: 2x=3 You can do: (2x)-(3) It'll solve it.
My DM42 works the same way as the Sharp. It works fine even if it is a touch less literal. If you are strong in math, you can make any of these calculators do the job. But, if you are a high school student for whom math is not your natural "language", then the more straight-forward and literal the calculator is, the better. Thanks for the comments. You might be the first cat that has ever left one!
@scottcollins7513 That's the beauty of math, isn't it?
The Sharp has a massive advantage: It's overclockable. There's an external timing resistor. Change that resistor and you can speed up or slow down the calculator.
That is not something I would have ever thought about. Like the "turbo" button on a 90s PC. The Sharp gets little attention in the US, but it is a respectable calculator w/ a nice keyboard. Thanks for leaving the comment.
The labels rubbing off thing, I hate that.
Agree. Seems silly for that to be an issue.
Thank you very much 😊
You are most welcome - glad it was helpful to you. Thanks for saying so.
this convinced me to get it, it feels bad paying 50 bucks for a scientific calculator but i feel that value isnt really a consideration here, any calculator would give me insane value anyways since unless it breaks and they usually dont im gonna be using this thing for like a decade. Great review.
Agree that $50 is high, but good point about it being something you will likely use for easily 5 years. I'm not a TI fan, but this particular calculator is my favorite "mainstream" calculator (in my heart of hearts, RPN calcs will always be my favorite). Glad you found the review helpful and let me know.
Are you a calculator collector? Great videos man!
Not sure I would go so far as to say I am a collector, but I definitely have more than a typical person needs! Thanks for the kind, encouraging words.
thanks man.
Glad you found it helpful and appreciate you saying so.
Thanks for the comparison. Now that the 991ex is no longer available I am wondering if the 115ES Plus 2nd Ed would make a good backup? Yes there is the Ti 30X Pro MathPrint and it does have nice features such as the persistent memory but I like the Casio layout since I have using them for years.
YES. I think the fx-115ES Plus 2nd Edition would make a good backup. I actually prefer it over the 991EX, but I doubt most people would. The other thought would see about buying a 991EX used off ebay.
Nice demo. This is obviously a design flaw by Casio. I think to be 100% sure one should always use parenthesis to avoid confusing the calculator and double check you work. I think 991ex is still the king of the Casio lineup.
Thank you for leaving the kind words. Yes, using parentheses for everything is the safest route, but what a headache. 991EX is the best in this price range in terms of performance and quality. Like I said in the other comment, I actually like the 115ES Plus 2nd Ed more, but that is b/c I think it is a bit more straight-forward, has a bigger font, and offers a few more features.
@scottcollins7513 hi so do u think the 115ES Plus 2nd Ed is better than the CW?
@scottcollins7513 my first choice was the 991ex however I can't buy it anywhere. These are the available ones 991cw 115es plus 2nd Ed Ti 36x Ti 30x pro mp The ti 30x pro mp is 70 while the rest are only 30 is it worth it to pay more for the ti 30x pro mp?
@@ys-fz9mt Depends what you prioritize. Personally, I prefer the 115ES over the 991CW bc I can get to what I need more quickly and the way it works is fully thought through (ex: scientific notation). I'm willing to give up some speed and display quality.
Just realized you had more in your list. If you take good care of your things, can afford the additional $40 w/out too much pain, and if it is something you will still be using 5 years from now, I think the TI-30X Pro MultiPrint would be the best. If value is highest priority, I would choose either the 115ES Plus 2nd Ed or the TI-36X Pro. 991 CW would be my last choice, but it is still respectable.
Thanks for the comparison. Most brands will only go up to ^3. But if you know basic index rules you can get the power you want. But yes the Casio wins in this department by a large margin.
Thanks for leaving a comment -- agree that it is quite simple to do without a calculator, but that is coming from a math nerd. It's also a rather meaningless concept for most high school students (and anyone else living in the "real" world), so I can understand why they'd want a calculator that could do it for them.
FUCK MY FUCKUING JGINGOIWNOIWEGNOWEIG
Legend, thanks for this video.
Happy to know you liked the video. Thanks for leaving word.
Comment faire pour que la calculatrice affiche 2π^2 lorsqu'on tape 2π×π
Ce n’est pas quelque chose que la calculatrice fera, mais que vous tapiez 2*pi^2 ou 2*pi*pi, vous obtiendrez le même résultat numérique.
@@scottcollins7513 essaye de me trouver une calculatrice comme la numworks qui peu faire cette fonctionnalité stp
thanks so much! But I'm using fx-8200 au, and there is no calculation or solve button. only = and exe button 😭
When I program this on my 42, I get a DUP, do you have your flag 11 off or something else, so it will not appear? thx.
It's been a long while since I made that video so I need a little more info. Are you trying to program QUAD (to find roots of a quadratic)?
which one is better, 115esplus 2nd edition vs 991cw ,, help
First question is do they sell the TI-30X PRO MathPrint (must be MathPrint) where you live? If so, THAT is the one to get. If not (for ex if you live in the US), then I need to know what are you planning to use it for.
omg u replied to every comment
That is the goal - for fun, I could have ignored yours! Thanks for the comment.
THANK YOU!!
Happy to hear you found it helpful -- it's something I wish I knew a long time ago!
This helped immensely. Thank you
Happy to hear it helped and appreciate you letting me know.
Nice comparison. It would be good if you did a full review of the new model against the 991-EX.
From what I know, the fx-991EX is discontinued in the USA. Its replacement is the fx-991CW. And, since the TI-30X Pro MathPrint is not even sold in the USA it is hard to justify putting in any more time. Regardless, I appreciate the suggestion and you taking the time to mention it.
I'm going to take my precalculus midterm, should I buy the fx-991cw or fx-115es? We've just about covered quadratics, their inequalities and halfway into logarithmics.
A few questions: 1 - Do you live in a country where the TI-30X Pro MathPrint (make sure it is a "MathPrint") is available for around the same price? Even though I have traditionally preferred CASIO (and even SHARP), I like the TI best for this type of calculator. But, if your only option is the TI-36X Pro, it is less compelling b/c it is just an old design. 2 - Would you prefer the benefit fewer keystrokes to get to the answer at the cost of being less user-friendly? Or, do you like the benefit of user-friendly at the cost of things taking more keystrokes to answer? My personal GENERAL preference would be: 1st - TI-30X Pro MathPrint 2nd - CASIO fx-115ES PLUS 2nd Edition 3rd - CASIO fx-991EX 4th - TI-36X Pro My personal PRECALC-specific preference would be: 1st - TI-30X Pro MathPrint 2nd - CASIO fx-991EX 3rd - CASIO fx-991CW 4th - CASIO fx-115ES PLUS 2nd Edition
@@scottcollins7513 thank you so much for replying. I'm in the US and I'm looking for the best possible non graphing scientific calculator due to testing restrictions for my class. I do have access to the TI-30x pro. I already own a Numworks calculator and an Nspire Cas II, I don't have any budget constraints when it comes to math learning. I prefer user friendliness but I really do want features like quadratics solvers and inequalities. Thanks again.
@@scottcollins7513 Hi, thank you so much for responding. I'm in the US so I don't have access to the TI-30x unless I import it. I own a Numworks calculator and I unfortunately can't use it on these upcoming tests, just non graphing scientific calculators. I don't mind a few menus as long as I can understand what to do intuitively with no hidden commands only learned through a menu. I don't have any budget constraints, math learning is a top priority for me. Thank you for your help!
@@alexmo1941 Could you further clarify what you mean by "no hidden commands only learned thru a menu"?
@@scottcollins7513 Sorry, I mean something that doesn't show up on screen as an option and you have to read the manual instead to find out how to proceed.
Please help!!! why does this not work with certain numbers. For example the equation 10y^2 + 17y + 3
It will work w/ that equation, but it is trickier. Watch this video: th-cam.com/video/iuteYC5d1iw/w-d-xo.html For your problem the roots that the calculator provides are x1=-1/5 and x2=-3/2 which leads to the factors (5x+1) and (2x+3)
@@scottcollins7513 thank you so much!
@@tylerd6517You are welcome.
I am glad I have bought the ex when I could, because the cw looks a like product rushed to market without proper engineering (not only for this flaw). Thanks because I would have never understood that.
Glad you found the video informative. I'm still surprised they made this "error" w/ such a key product. CW is still respectable, but EX is better. Thanks for leaving a comment.
Why would it need to be something using the metric system to use engineering notation? A better example would have been "What if I am doing electronic calculations..." I do like the looks of the ClassWiz, pity that it's not programmable.
Can do a video on casio fx 5800p plz
@@abather11 I do not own that calculator. I will do some research on it. Regardless, thanks for the suggestion!
This one is the only function I miss in TI. I don't know why they do not introduce it. I know TI is stuck at the 90's. I still prefer it because it's easier to me, is more logical. But for someone who works daily with 10^x numbers this is very useful (even if probably more useful for students because after a bit i guess the jumps will be as easy as counting from 1 to 10, but don't know)
I think the TI-36X Pro is respectable. The TI-30X Pro Mathprint is better (but hard to get in US). But, no need to make excuses for liking either one -- they are solid. I have not needed the ENG Notation, but understand where it would be useful if trying to express numbers in different units. Seems like something TI could add without too much difficulty. Thanks for weighing in.
@@scottcollins7513 the biggest problem, in my oponion, is the lacks of buttons 😅. Ti has less buttons than Casio, and they are almost all taken, but probably they could think a new "pattern" after 40 years... Yeah well, in Italy texas has almost disappeared... I had to buy the 30x from Germany. (And I am trying to discover any place that still sells the 108... I would like to get one of the 5th ( I think) edition... hope they relaunch it on the market again
@@MrMarcec85 I have never been much of a Texas Instruments calculator fan. BUT, I will say that the TI-30X Pro MathPrint is probably my current favorite among this type of "advanced scientific" (non-CAS) calculators.
I there is no way to double check, put it in a garbage!
Ha! And if you do, I will probably be digging through your trash.
What a piece of poor programming.
Yes. It is rather amazing that it was released this way.
Thanks scott! Its a shame the old one isn't available anymore... i got one used in pristine state last year to use on master degree due to the prohibition of programmable calculators on my course, and have no regrets. But I still prefer my hp32s in my daily use
The new one is still good, but I do prefer the 991EX. I've never used an hp 32s, but I'm sure that is a nice device. You have 2 winners!
can you show how the matrices function work?
Sure. It may be a few weeks before I get to it, but I will make a point to cover Matrices and Vectors. Thanks for the suggestion.
@@scottcollins7513 thanks that will help me a lot!
Thanks allot
You are very welcome, Esther.
@@scottcollins7513 scott but why doesn't it get scanned on my calculator
@@EstherOmowumi-ni9vr What do you mean by "get scanned"? I'm not sure what you are asking. Perhaps you could rephrase the question? I'd like to try and help.
@@scottcollins7513 I mean the manual
@@EstherOmowumi-ni9vr Do you mean you wish your calculator had a copy of the manual on it? Sorry - I might be being dense, but I still am not sure I understand.
i want the ex sooo bad man
I am guessing you can find one used. I do prefer it to the fx-991CW that replaced it in the US. If you live outside the USA, you might want to check out the TI-30X Pro MathPrint -- it is my favorite in this category.
@@scottcollins7513 would you know feture wise what the it-30x pro may be missing compared to the 991 ex?
@@goneman2195 It does not have the QR-code graphing ability, but I do not view that as an important feature. Otherwise, I cannot think of anything important that it is missing that the 991EX has. Also, TI has a much better way of reusing previous expressions and answers -- it is just superior. Also, when you turn off the TI, you do not lose any of your work. It is better - period in my view. AND, I am NOT a TI fanboy. I have traditionally favored CASIO over TI. But, if you can get the TI-30X Pro MathPrint (and make sure it is the "MathPrint" version) for around the same price as the 991EX, you would be very happy w/ it, I think.
This is serious. I think they changed this because it makes the numbers look prettier. Another really bad decision by Casio.
I am really surprised it got through all the testing. I think there are going to be a good number of students who get confused by it.
A big problem I have with the cw is I can’t use an equation from the history, add an equal to it and solve. I have to re-enter the equation in solver mode. I feel like nothing much was changed for the better.
That is an interesting point. Not something I would have thought of/about, but always glad to hear how others use the devices. Thanks.
Maybe because they use Pamdas rule, I thought this because they said they are using notebook notation, hence, we are expected to write Equation in the way we would Interpret it if no brackets were given
I think the big problem is that they have turned scientific notation into multiplication which is not the same. Whether I say 1,000,000 or 1E6, I am representing a single number and not a product. I am not going to let them off the hook on this one. Regardless, I do appreciate you leaving your thoughts. Always good to hear what others are thinking.
@@scottcollins7513 I watch this video after buying
Ehh, really not expected!