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Casio FX-991 EX classwiz calculator tutorial (perfect for algebra, FE exam, EIT exam)

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  • Опубликовано: 6 авг 2024
  • Congrats to giveaway winner: Matheus Henrique (with 473 likes on 12/31/16)
    CLASSWIZ: www.shopcasio.com/product/calc...
    Casio FX 991 EX calculator classwiz tutorial & GIVEAWAY!!!
    HURRY UP & COMMENT NOW!
    The more time you have till 12/31/2016, the better chance you have to get more "LIKES"!! Share with your friends to "like" your comment!
    "IT HELPS YOU TO HATE MATH LESS!"
    8 REASONS TO LOVE THIS CALCULATOR!!
    @0:27, Solve quadratic equation, solve polynomial equations
    @2:02, Solve system of equations, solve simultaneous equations,
    @2:56, Complex number on calculator, divide complex numbers
    @3:30, Log with any base, log base 8 of 4
    @3:50, inverse sine, inverse trig, changes degrees to radians
    @4:47, summation, sigma summation on scientific calculator,
    @5:32, derivative of x/(1+x^2) at x=3,
    @6:14, indefinite integral of sqrt(x) from 1 to 4, integral of sqrt(x) on calculator,
    Perfect for FE and EIT exam,
    Top 5 reasons of getting the Casio fx-115ES PLUS (perfect for EIT, FE exams, back to shool) • Top 5 reasons of getti... ,
    Bonus features: • Casio fx-115ES PLUS bo...
    blackpenredpen
    tags: best scientific calculator, Casio FX-991 EX calculator, calculator tutorial, calculator for algebra trig calculus, calculator giveaway 12/31/2106, back to school calculator, calculator for high school algebra, CASIO scientific calculators, quadratic equation on calculator, system of equations with calculators

Комментарии • 358

  • @luiferreira8437
    @luiferreira8437 7 лет назад +182

    I'm in love with this calculator! OMG!!

    • @blackpenredpen
      @blackpenredpen  7 лет назад +1

      I fell in love with it too since my student told me about it.

    • @aadilshaikh2499
      @aadilshaikh2499 7 лет назад

      youre a teacher ? >

    • @evaeva3062
      @evaeva3062 6 лет назад

      yassss

    • @sleetskate
      @sleetskate 6 лет назад

      I told my mom to get me a scientific calculator, she comes home with casio fx-991ex. its been a year and it still amazes me to this day.

  • @mehwishbhatti6207
    @mehwishbhatti6207 5 лет назад +11

    Got this for my additional maths and it's a charm. Absolutely love the display and the menu, it's just brilliant. It's my main calculator as my old casio one just looks to shabby. Came here to learn other features, unfortunately didn't really learn anything but I do love a maths enthusiast

  • @gary3ward
    @gary3ward 5 лет назад +2

    I love that it keeps answers in the exact form as long as possible. I also like that it treats 2(x+1) or 2(radical)3 as (2(x+1)) and (2(radical)3)) like I am used to even inserting the extra parentheses. EquaserTV on youtube has a series of 13 videos on this calculator that covers all the modes. I love the separate 'X' key and that 'Shift' + STO(recall) shows all the memories and the values in them in case I forgot which one to use!

  • @kasiorap
    @kasiorap 3 года назад +2

    mine just arrived, ive been using an older model for years throughout school and freshman year of uni and i needed an upgrade, this one is totally worth it

  • @christianrodriguez823
    @christianrodriguez823 7 лет назад +113

    This is actually such a cool calculator, id be the coolest kid in multivariable calc next semester if I rolled up with this bad boy (my uni doesn't allow graphing calculators so this is a sneaky alternative :D)

    • @blackpenredpen
      @blackpenredpen  7 лет назад +11

      LOL COOOOL!!!
      Best of luck and happy holidays!

    • @christianrodriguez823
      @christianrodriguez823 7 лет назад +2

      blackpenredpen Thanks same to you! (The holiday part, not the luck part 👍🏼)

  • @laptech3767
    @laptech3767 2 года назад +2

    Used this calculator from middle school all the way to college ! Doing calculus now and this still a charm !

  • @hishamshakil5790
    @hishamshakil5790 7 лет назад +4

    I have been watching your videos for a while and they help for my maths classes here in the UK. Thanks for these! I don't really need the calculator but it's great that you're doing this giveaway!

    • @blackpenredpen
      @blackpenredpen  7 лет назад +2

      Hisham Shakil I am glad to hear, thanks for watching my vids. This video is mainly for fun and it's also Bc it's Xmas time. :). Happy holidays

  • @davids9139
    @davids9139 7 лет назад +1

    I have the fx-115ES Plus and I'm getting a fx-9860GII for Christmas. I'm a big fan of all calculators. I really like Casio and TI. The joy of understanding math and it's practical applications is an awesome gift. My college makes sure we understanding how to solve math questions without the calculator. It makes one appreciate the use of a calculator so much more. Thank you for making these videos.

    • @blackpenredpen
      @blackpenredpen  7 лет назад +1

      You're very welcome. I am glad that you enjoyed my videos

  • @lewist5631
    @lewist5631 6 лет назад +69

    Just started a level maths, got this calculator, thank you so much for the help man it acc helped me so much

    • @hamzahhussain6580
      @hamzahhussain6580 5 лет назад +2

      This year's paper for A2 was bullshit

    • @formulaintuition8756
      @formulaintuition8756 5 лет назад

      @@hamzahhussain6580 ikr

    • @north6660
      @north6660 5 лет назад +1

      Hamzah Hussain, lol just look at student rooms, and also sign the petition thats up, it went from 2k to 10k in a day

    • @hamzahhussain6580
      @hamzahhussain6580 5 лет назад +1

      @@north6660 that petition won't do anything. I learnt all of a level maths myself with no teacher. I had a textbook that was supported by edexcel and they put questions that aren't even taught in the text book

    • @north6660
      @north6660 5 лет назад +1

      @@hamzahhussain6580 yeah I thought that also, but people are still trying, edexcel gave us one thing for 2 years that was not of any use in the papers, today's paper (3) will also be a nightmare.

  • @gaius_marius
    @gaius_marius 5 месяцев назад +1

    Very nice overview of the FX-991EX. I have this calculator, and there are so many functions that it takes awhile to know how to use everything.

    • @saujanyapoudel8910
      @saujanyapoudel8910 5 месяцев назад +1

      RUclips channel 'The Calculator Guide' has many videos of this calculator. Detailed tutorials that saves ton of time

  • @blackpenredpen
    @blackpenredpen  7 лет назад +57

    IT HELPS YOU TO HATE MATH LESS!

    • @pykeselslayer
      @pykeselslayer 7 лет назад +1

      blackpenredpen The bee movie but eveytime they say bee it plays every blackpenredpen video backwards and every time he says x it plays it plays the outro but 10 decibels louder and pitchshifted down 3 octaves 40 times.

    • @teferiboi7771
      @teferiboi7771 7 лет назад

      I have a feeling that ur gonna win the calculator

    • @blackpenredpen
      @blackpenredpen  7 лет назад +1

      haidar fakih Lui already has 56 likes

    • @luiferreira8437
      @luiferreira8437 7 лет назад +1

      I'm asking to all my friends to like my comment! Here in Brazil it's very helpful and expensive

    • @blackpenredpen
      @blackpenredpen  7 лет назад +1

      Lui Ferreira cool I see. Best of luck. You are winning the race at the moment and keep it up!

  • @AhnafAbdullah
    @AhnafAbdullah 7 лет назад +1

    Awesome :D I already bought this calculator and have been using it for a few months, it's awesome for Pure Mathematics and Mathematics B, although I also use it for Accounting

  • @jinx1120
    @jinx1120 4 года назад +5

    Far and away, this is my favorite calculator!! Thank you for this easy breakdown of these great functions!!

  • @alondrarocha8644
    @alondrarocha8644 5 лет назад

    this helped a lot! i just got a one and i didn’t know how to use it for my final exam!

  • @sunnysharma5166
    @sunnysharma5166 4 года назад +1

    My same to same calculator and same result as you did sir .it will be very helpful for myself in upcoming future

  • @studytv6144
    @studytv6144 4 года назад

    Thankyou so much for This! Just got mine today and I'm excited to use it 😁

  • @davidbrooks8621
    @davidbrooks8621 Год назад

    Excellent exercise demonstration for new students

  • @akhileshprajapati2591
    @akhileshprajapati2591 5 лет назад

    I'm from India
    And am buying this calculator because now am Btech student
    I just to know to use this and from your video i get it
    Thanks alot 😇

  • @dexternavejar8365
    @dexternavejar8365 7 лет назад +1

    "Wouldn't it be niiice" to have a brand new Casio calculator? 😄
    Love your videos. Best of wishes to you. Merry Christmas, and a Happy New Year!

    • @blackpenredpen
      @blackpenredpen  7 лет назад +1

      Thank you!And I like your "wouldn't it be nice" quote! = )
      Happy holidays!

  • @elpumatejada
    @elpumatejada 7 лет назад +15

    I gonna start studying enngenering next semester this would really help me

  • @jaze0187
    @jaze0187 3 года назад

    So excited for this calculator. Just bought, first stop: statics, applied differential calculus and physics. Hopefully my head will stop hurting

  • @AprendizDeLoQueToca
    @AprendizDeLoQueToca 3 года назад +1

    Great vid and vibe. Thanks bro 🙂🙏

  • @korenemcdow9573
    @korenemcdow9573 7 лет назад +1

    Awesome calculator! I hope I win! Also, thank you for your Casio FX-115ES Plus tutorial. I am taking my FE in a few days and your tutorial really helped me learn to use my calculator.

    • @blackpenredpen
      @blackpenredpen  7 лет назад

      Ms McDow thank you. And best of luck on ur FE exam!

  • @tonycelestro1959
    @tonycelestro1959 7 лет назад +1

    I replaced my TI with a Casio fx-115 ES about 9 years ago and its still working. But it would be nice to have a new one.

  • @jadepangwaiho
    @jadepangwaiho 7 лет назад +1

    Your videos bring me a lot about the sense of integration, such as D.I. Method. Perhaps, this channel also brings me some trick about trigonometry identities, it enlighten my mathematical sense . Despite Hong Kong's schools are not allow to use this type of electronic calculators, I really want to say thank you to you.

    • @blackpenredpen
      @blackpenredpen  7 лет назад

      Jade Pang thank you for watching my vids. Best of luck in your studies.

  • @godfreyhamshire
    @godfreyhamshire 7 лет назад +1

    Enjoyed your channel, we have learned a lot from you, keep up the good work!!!

  • @vedakrishna7526
    @vedakrishna7526 7 лет назад

    you just helped me soo much thank you!!

  • @MrRaad1963
    @MrRaad1963 4 года назад

    Thanks, been true help for me

  • @gurdwarananaksarbirmingham1063
    @gurdwarananaksarbirmingham1063 3 года назад

    Thank you really appreciate your guidance

  • @davidcarrascal
    @davidcarrascal 7 лет назад +5

    You look like a great person, thanks for everything you do unselfishly, I can afford the calculator thanks to my work, give it to anyone who needs it more than I, thanks again :) happy holidays

  • @dogwalk3
    @dogwalk3 6 месяцев назад

    can't find these anywhere anymore! there's a bunch of fake ones selling for big money like crazy now. happy to have one & finding these 7 year old videos helpful 🙏

    • @joy3681
      @joy3681 5 месяцев назад

      Infelizmente a casio não produz mas esse modelo, consegui a versão fx-570lax que é igual a essa só que sem painel solar mas já esgotaram. Agora só produzem a cw

  • @odelyagrace
    @odelyagrace 4 года назад

    Great and helpful tutorial!

  • @sirocoland
    @sirocoland 7 лет назад +1

    It's awesome. I need one!

  • @fet1612
    @fet1612 3 года назад

    The calculator is cool. Your tutorial are fantastic.

  • @TheCalculatorGuide
    @TheCalculatorGuide 7 лет назад +1

    It's a fantastic calculator. Very user friendly with lots of features. Nice Video.

    • @blackpenredpen
      @blackpenredpen  7 лет назад +2

      Thank you. I also see that you have many nice calculator tutorial videos as well. Keep it up!

  • @twingray
    @twingray 3 года назад

    Thank a mil. You help me out a lot

  • @umutorwhatever
    @umutorwhatever 4 года назад +1

    thanks for the tutorial man!

  • @sovietxlr
    @sovietxlr 7 лет назад +4

    Your method on partial fractions made me score maximum on my test.
    It would be really helpull to get my hands on one of these.

  • @ralphwv
    @ralphwv 3 года назад

    Great video, thanks a lot.

  • @zorro1906
    @zorro1906 5 лет назад +1

    You deserve 100k likes for this video not 1.1k
    Thank you so much for tutorial

  • @norbert7297
    @norbert7297 2 года назад

    oh boy, im gonna destroy the next exam with this soooooo much!! Buying mine today! i wish i knew these things existed..

  • @anuragmahajan5919
    @anuragmahajan5919 5 лет назад

    Hello blackpenredpen, your videos are great and really helpful!!! Can you please make a video on how to use Casio 991ex to solve matrices?

  • @loreenfernandes7974
    @loreenfernandes7974 Год назад

    Thnkx alot really helped
    But wt about the xl sheet present in tht calculator. 😅

  • @mydramaspace8240
    @mydramaspace8240 5 лет назад

    very helpful! thanks a lot!

  • @blackpenredpen
    @blackpenredpen  7 лет назад +56

    It's about one more week left till 12/31

    • @blackpenredpen
      @blackpenredpen  7 лет назад +1

      yea, me too

    • @bigdavidsmith7167
      @bigdavidsmith7167 6 лет назад +1

      blackpenredpen can I play Tetris or any other game on this calculator???????????????????

    • @joshharrison9244
      @joshharrison9244 3 года назад +1

      Please, I am desperate for a classwiz and have always looked up to you.

    • @randomshots
      @randomshots 3 года назад +1

      @@bigdavidsmith7167 its non programmable. So it's not possible to play games on it.

    • @navinsaxena7060
      @navinsaxena7060 2 года назад

      Av v a av. V v v a a b. S BC. C. S. S. V v vvv vvvvvvvvvvvs sbs av v vvv vvvvvv a. V vvvvva àaaa. S ß. Á s à@@bigdavidsmith7167

  • @LisaFly652
    @LisaFly652 7 лет назад +1

    You make math easier to understand. I should have bought this calculator!!!!

    • @blackpenredpen
      @blackpenredpen  7 лет назад

      LeekaLisa thank you. Yea you should consider getting this calc

  • @liamtaylor3576
    @liamtaylor3576 6 лет назад +1

    Defiantly getting one of these for my exams next year

    • @jaze0187
      @jaze0187 3 года назад

      and? whatcha think

  • @shortclips9840
    @shortclips9840 3 года назад

    it's very relaxing you're using background music while teaching. may i know the title please? i really want to listen to it while reviewing it relaxes my brain.

  • @Genocidechaos
    @Genocidechaos 7 лет назад +4

    Love your videos and good luck to everyone else

  • @what3vaaa251
    @what3vaaa251 7 лет назад +4

    You are a super awesome professor!!!!

    • @blackpenredpen
      @blackpenredpen  7 лет назад +3

      Melia thank you Melia. Hope everything is going well for you.

  • @krisnasaputra4340
    @krisnasaputra4340 7 лет назад +1

    COOOL ! I want that calculator right NOW !!!

  • @TheSrijith2
    @TheSrijith2 6 лет назад

    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

  • @primacatherina
    @primacatherina 6 лет назад

    Thank you.. ini sangat membantu

  • @ethanclark4116
    @ethanclark4116 7 лет назад +70

    There is a joke about a deranged mathematician who would frighten other inmates by screaming "I'm going to differentiate you!" One inmate remained calm and said "I don't care, I'm e^x."

    • @blackpenredpen
      @blackpenredpen  7 лет назад +3

      Ethan Clark lol classic!!

    • @lactatia235
      @lactatia235 5 лет назад +6

      we dont speak math language here

    • @giovannimasci7606
      @giovannimasci7606 5 лет назад +1

      Unless he is going to differentiate them by y, there is nothing to laugh then...

    • @MosesPeru
      @MosesPeru 3 года назад

      @@lactatia235 😂😂😂😂

  • @aqeeladanish9907
    @aqeeladanish9907 3 года назад

    THANK U DUDE, I HAVE END OF SEMESTER TEST AND HAS EQUATIONS AND FUNCTIONS. AND I CAN U THIS CALCULATOR. BYE GUYS 15 MINS THIS TEST GON START

  • @rishabh1970
    @rishabh1970 5 лет назад

    Amazing Video !

  • @babysealclub11
    @babysealclub11 5 лет назад +1

    I like this calculator but one huge draw back is that when switching modes or turning it off, your previous calculations/ functions are erased. ... You can't even multi task. The Ti36 pro can. If Casio can add that ability to their next scientific calculator it would be awesome! I really like this calculator but having to reenter large functions is painful.

  • @louismackinnon9943
    @louismackinnon9943 7 лет назад +2

    I need this for stability calculations on my ship, yah know so we don't sink not because I won't have to do it all long hand 😂

  • @ItsTopCat
    @ItsTopCat 7 лет назад +2

    that is one sexy calculator, I hope someone who really needs it gets it :)

  • @josejefin01
    @josejefin01 5 лет назад +1

    Is there anyway you can integration without a range?

  • @sharonheard2619
    @sharonheard2619 4 года назад

    Thank you so much for your knowledge! You have an awesome ability to make things so much easier for me!

  • @davy5537
    @davy5537 3 года назад

    Thank you, bro.

  • @prog_demos
    @prog_demos 6 лет назад

    Amazing tutorial, thank you!
    I guess 17 people couldn't have afforded this calc lol

  • @ajckne
    @ajckne 5 лет назад

    Thank you very much!!!!!!!

  • @sidharthpatro2106
    @sidharthpatro2106 4 года назад

    Sir plz solve some determinant and matrix problems

  • @alongolov
    @alongolov 7 лет назад

    thanks, man u r great

  • @apostolosfilippos
    @apostolosfilippos 2 года назад

    You are awesome !!!

  • @gigilaco
    @gigilaco 6 лет назад

    great review man!

  • @adrboe3027
    @adrboe3027 6 лет назад +2

    I have my final high school exam tomorow, this was so helpfull! I can only wonder why our teacher didn't show us all the awesome features

  • @evolve2survive324
    @evolve2survive324 5 лет назад

    in the market for a new calculator : casio fx-991 ex or texas instruments ti 36x pro. Which should i get ?

  • @TiberiusStorm
    @TiberiusStorm 6 лет назад

    How do you convert milli to micro on a Casio 991? It will display the symbols for an answer in ENG but I can't seem to get them to appear on my own.

  • @maconatop
    @maconatop 3 года назад

    So you know any calculator which can do simultaneous equations with 3 equations where element is a complex number

  • @mariannafinks1002
    @mariannafinks1002 4 года назад +1

    Hello i want to ask you something, I'm trying the integrate but my result is 4 2/3. Why? Also i tried 8-2i/5+2i and my result is 32/41-1 1/41i ?

  • @vihangaakalanka1981
    @vihangaakalanka1981 7 лет назад +1

    ok cal is great
    bt my question is how did you manage to migrate to us?

  • @MONER0
    @MONER0 4 года назад

    thank you man that helped me alot
    Iam from Egypt and that calclutor is cheap
    and it gives me the solutions in Arabic
    it costed me only 380 pounds

    • @maariyah6944
      @maariyah6944 4 года назад

      U do know that this video was in 2016...

  • @clayton3518
    @clayton3518 2 года назад

    very nice calculator, when I grow up I will buy that

  • @rgrtrb3746
    @rgrtrb3746 7 лет назад +1

    Just a small question on the spreadsheet;
    If I write some data on the spreadsheet and I turn off the calculator, when the power back up the numbers in the spreadsheet are stored or deleted?

    • @randomdude7982
      @randomdude7982 2 года назад

      It is deleted when you turn it off and that's a big minus point for this calculator.

  • @MAHIMAHI-di8cr
    @MAHIMAHI-di8cr 7 лет назад

    can u tell tell how to use pol botton on 991 fx calc

  • @cynthiaj.simmons870
    @cynthiaj.simmons870 5 лет назад

    "Cool Video!!!" 🙂🙂🙂 I bought one of this cool calculator at my local Walmart today on sale $9.00 it said $11.00 on the package but it scanned at $9.00 I'm not much mathematically inclined but for some advance functions I'll be needing it for crafting and sewing it's pretty cool to have.

    • @joshharrison9244
      @joshharrison9244 3 года назад

      Please may you give me the location of said "walmart". That is a bargain if I've ever seen one, my local only sells them for $10.

  • @rubenciapararodriguez1700
    @rubenciapararodriguez1700 7 лет назад +5

    sweet baby jesus, that calculator is amazing!

  • @xanh350
    @xanh350 5 лет назад +1

    Can I ask, anyone can answer at this point, is this calculator better or the fx-991ES ?

  • @evolve2survive324
    @evolve2survive324 5 лет назад +1

    hello, can you advise , does this calculator lose the data in its memory if you switch operation or turn off the calculator ?

    • @randomdude7982
      @randomdude7982 2 года назад

      Yes, it loses all the calculations history unless you have the value stored in one of the variable memories (The alphabets like A,B,C etc.). Input the value you want to store and press "STO" then press one of the buttons in the 3rd row (for example A). The next time you need that value, you press alpha and that particular button.

  • @princepayel8425
    @princepayel8425 5 лет назад

    Bro thanks a lot.

  • @terimyers6872
    @terimyers6872 7 лет назад +2

    I love your videos! We are not allowed to use graphing calculators but this would be acceptable.

  • @muznaaijaz5179
    @muznaaijaz5179 3 года назад +1

    3.40 we can solve log in complex numbers mode?

  • @imperialrecker7111
    @imperialrecker7111 3 года назад

    I prefer this over my ti nspire. It can do anything my ti can. except graphing equations. Highly recommend to pick this calculator up

  • @ashleyfritz1553
    @ashleyfritz1553 5 лет назад

    Can you factor on this calculator?

  • @Inferno-ob9td
    @Inferno-ob9td 6 лет назад

    What about if the exam question is asking for working out aswell, for example the quadratic equation??

  • @matematicashijo4577
    @matematicashijo4577 7 лет назад +1

    i woud like get it due to the fact i really love maths now im studyng the lic. on maths but mi calculator isnt no good Si y of you can help y would be Nice also y love your vídeos

  • @yuvermarrero1704
    @yuvermarrero1704 4 года назад

    hello i have a Casio Fx 991 LAX, can i use tha for the Fe Exam ?

  • @nagly3873
    @nagly3873 4 года назад

    How to
    calculate indefinite integrals?

  • @michaelthegreat1
    @michaelthegreat1 7 лет назад +8

    i'd share this comment if i had friends to share it with...

  • @ceejay706
    @ceejay706 6 лет назад

    I need this for my Basic Calculus subject i'm buying it next week

    • @ceejay706
      @ceejay706 6 лет назад +1

      Update: I fuckin bought it already, fuckinnn nice

  • @ronpinto2372
    @ronpinto2372 5 лет назад

    thank you!! :)

  • @RansomUsername
    @RansomUsername 7 лет назад +1

    Wow, what a nice calculator!

  • @DuddPineapple
    @DuddPineapple 5 лет назад

    I have a question. My 991EX screen has suddlenly become really faded, like the digits barely appear on screen, but when I cover the solar panel they are back to normal. Why is this? Its so annoying. I've tried everything even the contrast settings which don't do anything. Any got any advice?

  • @DivineDragonCrisis
    @DivineDragonCrisis 4 года назад +1

    does this calculator have the feature of step-by-step backtracking like the Casio fx-115ES PLUS?

    • @randomdude7982
      @randomdude7982 2 года назад

      Yes! In fact, it has lots of similarities with the 115 es, kind of like brother calculators.

  • @ungodlygrace3216
    @ungodlygrace3216 5 лет назад +1

    Hello, does this calculator save a history of recently performed calculations?

    • @randomdude7982
      @randomdude7982 2 года назад

      As long as you not press "On" button or turn it "Off", it does save it in the replay memory otherwise, it simply will be gone.

  • @BloodySunnday
    @BloodySunnday 6 лет назад

    thanks for the video :)