is casio fx 991ex a graphing calculator

Applications that are well-suited for use in science classes. Casio FX 55 Scientific Calculator for sale online eBay.

Large Natural Textbook Display (Natural-V.P.A.M. For the middle and high school grades, the calculator has basic spreadsheet functionality, ratio and statistical functionality, down to ration calculations and prime factorization. If you require an even more powerful and more advanced calculator, the Casio Graphic calculator fx-CG50 provides dynamic graphing; capable of calculating and displaying graphs, charts, spreadsheets and statistics.

Select Language The use of a natural textbook display and high resolution screen allows me to present mathematics the way students see mathematics in their textbooks. Casio offers a variety of graphing calculators that all come with their own display specs and functionality. Typically a function reserved for graphing calculators, Casio's new CLASSWIZ fx-991EX scientific calculator features a basic spreadsheet function that allows users to

Visit our FAQ page to find out more about our calculators. WebCasio FX 991ESPLUS Natural Express Scientific Calculator. Please note you do not have to purchase these calculators for the qualification, and calculators from other manufacturers are available. Variety of functions available to support student's learning.

Hard slip on case included

WebCasio FX-991EX Classwiz Scientific Calculator - Black | Business, Office & Industrial, Office Equipment & Supplies, Office Equipment | eBay! I now have the power of a graphing calculator in the hands of every student. Our new AS and A level Maths and Further Maths 2017 textbooks also include Casio calculator tutorials to support students with using the new calculators. WebTake the scientific calculator to the next level. While both Casio and Texas Instruments produce a variety of graphing calculators, the Texas Instruments line of graphing calculators is undoubtedly the more well-known and well-loved of the two brands, especially when it comes to education and standardized testing across the country. WebI also recommend the CASIO fx- 991ES PLUS. Visual, interactive and textbook-based displays make operation easier for teaching the use of scientific calculators, so you can concentrate on teaching mathematics. The Casio models boast speedy processing and an intuitive user interface. This website uses cookies for tracking purposes. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. Mathematician Simon May shares his top tips for setting up the fx-CG50 for exams. Useful for learning statistics. The UK's best selling 'Advanced' Scientific Calculator, Allowed in every UK exam where a calculator can be used. Prime Factorization, Matrix and Vector Calculations. This page works best with JavaScript. More expensive than Casio graphing calculators, although still a good price for a graphing calculator with this amount of features. Allowed in every UK exam where a calculator can be used, View our Model Comparison Chart to find the right calculator for you, Going to be out? Graphs and other information can be displayed on smartphone or tablet screens. No calculator is perfect. The FX-991EX uses Classwiz technology, offers a new high-resolution LC display with 19263 pixels and a resolution that is four times higher than that of the familiar displays of the FX-ES Plus series. Separation every three digits makes even large numbers easy to read.

FX-991EX

Functions and Features

Display type: 62 * 192 FULL DOT Natural display
Algebraic input logic: Natural V.P.A.M.
Number of characters/lines: 16/1+10/1
Icon menu
Signific and function: 10+2
Memory
Repeat function
Variable memory: 9
Number of storable programs: Calc / Solv button
Functions: 552
Scientific constants: 47
Unit conversions: 40
Bracket levels: 24

, https://www.casio.co.uk/media/catalog/product/f/x/fx-991ex_front_1.jpg, https://www.casio.co.uk/calculators/education, /media/catalog/category/Scientific_Calcs_2022x419.jpg, Large Natural Textbook Display (Natural-V.P.A.M. It is a solid graphing calculator that can handle anything from geometry to biology and comes highly recommended by teachers. I love the simplicity of the Casio fx-991EX (ClassWiz). Texas Instruments Graphing Calculator FREE Ship! These sorts tend to run $15-$20 and include your 991EX. So a few months ago my mom bought me this Casio for college, but now that Im registering for classes I see that my calculator needs to be equivalent to the TI-84+ or TI-nspire (not CAS)., I have no knowledge on calculators.

As a student, the brand or model of your graphing calculator wont matter too much but bear in mind that Texas Instruments is the brand most recommended by educators. 991ex fx Calculation using advanced Riemann functions is also possible. 2 Year Electronics Protection Plan ($10-$19.99) - Allstate.

Slide-on protective hard cover included

While it does suffer some slowdowns while graphing, the ease of reading graphs, charts and equations is well worth the wait. Aside from Texas Instruments' more popular models, it also offers more advanced models, such as the TI-Nspire CXII CAS, which can be used for engineering. Mainland UKStandard: 1-2 Business days after dispatch(Express delivery only available for orders placed before 2.30pm Excluding weekends & Bank Holidays)Republic of Ireland & Channel IslandsStandard: 4-5 Business days after dispatchExpress: Not AvailableOur nominated carrier is Parcel Force. Numeric Integration/Differentiation, Simultaneous and Polynomial. Older models exists, but aren't readily available in stores. Perform ratio calculations such as A:B=X:D. Select units from the Metric Conversion Command List. x + 2y = 3 Perform calculations involving normal distributions, binomial distributions, and Poisson distributions. Texas Instruments graphing calculators come with intuitive software and a wide array of features packaged in sturdy hardware. Makes learning to operate the calculator fast and easy, Excellent quality and authentication ensure confidence and peace of mind for use in educational settings.

Input and display fractions, powers, logarithms, roots, and other mathematical formulas and symbols just as they appear in textbooks. Perform engineering calculations that include symbols such as k, M, m, and n. ClassWiz - Free Shipping on Calculator Orders of $25 or More, Degree, Minute, Secound (Sexagesimal) Calculations, Percent Calculation (scientific calculator function).

{ Thin and lightweight design that is super portable. For the best experience on our site, be sure to turn on Javascript in your browser. The ClassWiz also allows me to teach concepts I never could before. Dont let your students struggle with pre-exam stresses. Formulas are automatically wrapped to multiple lines. The COMPLEX numbers function is also extremely helpful. The new CLASSWIZ fx-991EX calculator, which features 274 functions and high-resolution LCD technology, raises the bar for classroom industry standards. 2 + 2 Calculation history data is all cleared whenever you press , when you change to a different calculation mode, or whenever you initialize modes and settings. Please click on your model for further help on eligibility and setting up your calculator for exams. Jakarta Utara Sanba Jaya (10) Casio FX-991EX - Scientific Calculator/Kalkulator Ilmiah FX 991 EX. Franais

View our Model Comparison Chart to find the right calculator for you

4 Reasons A-Level Maths Is a Brilliant Idea, 5 In-Demand Jobs for People Who Love Maths. While I usually am the odd one that picks an alternative option, in this case go with the recommend one. English Input and display fractions, powers, logarithms, roots, and other mathematical formulas and symbols just as they appear in textbooks.

Advanced mathematical capabilities make teaching mathematics more extensive and advanced. Solve the simultaneous equations. It runs new $49 retail and $30 if you poke around. Bahasa Indonesia Perform calculations using up to four third-order vectors stored in memory. BestReviews spends thousands of hours researching, analyzing and testing products to recommend the best picks for most consumers. Nearly all English words are displayed on the screen in unabbreviated form. Reviewed in the United Kingdom on December 29, 2022. Most of us have had, or will have, experience working with either a Casio or a Texas Instruments graphing calculator at some point in our education, whether it be in a chemistry lab or a calculus exam. Distributed by Tribune Content Agency, LLC. Interactive menu display realizes more intuitive operation. Could calculators help create more scientists? If you don't have one, WebCasio High-Resolution 3D Color Graphing Calculator - Black (FX-CG50) Casio 24 $94.99 MSRP $110.99 When purchased online Casio Basic 8-Digit Desktop Calculator (MS-80B) For more details about using multi-statements, see "Multi-statements.". Both support the addition of modules including CAS, but the stock version doesn't have them and it has a testing mode allowing it to be used in a way that ensures the student has no access to anything forbidden.

WebCasio Fx-991ex Engineering Scientific Calculator Konga Online Shopping Casio Calculatrice scientifique ClassWiz Fx 991 Ex 552 fonctions Caractristiques : la srie ClassWiz, offre un nouvel cran LCD haute rsolution avec 192 63 pixels, quatre fois The use of icons on the menu screen improves viewability. fx 991EX manual the app is no calculator shows all important functions of the graphing calculator CASIO fx 9860Gll lia.erc.gov.ph 2 / 9. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. 991EX Classwiz: Solving Equations and Visualization with Scientific Calculator Outdated hardware, including its display. 2 - Place your item in the original packaging along with the form. WebKalkulator Ilmiah CASIO fx-991EX Calculator Scientific 991 EX. Two methods enable authenticity checking before and after purchase. Ting Vit

522 Functions

Selection of the desired function is quick and easy. After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. How to motivate your students to become more interested in maths? Embed the Casio ClassWiz scientific calculator into ClassPad Math to bring an extra dimension to your workspace. Statistics, data analysis, probability and spreadsheets are all now within the realm of possibility. Interactive menu display realizes more intuitive operation. Addison Hoggard is a writer for BestReviews. Solve second-degree to fourth-degree inequalities. WebPlease update your CASIO calculator software to the latest version Supporting Remote Learning Download, activate, and purchase scientific / graphing calculator software for PC This calculator has a WebThe Casio fx-991EX itself doesnt have a graphing function, but it can tell your smartphone to make a graph. WebExam eligibility. 5 + 5 $65.00.

Other models to consider

Theres no need to recall and confirm individual values as with previous models. WebThe best non-graphing calculator I've seen yet.

Portugus WebCasio fx-9750GIII White Graphing Calculator Casio 16 $59.99 When purchased online Whether youre budgeting at home, working on math problems at school, or working the sales floor, a calculator is sure to come in handy. WebCasio Fx-991ex Engineering Scientific Calculator Konga Online Shopping Casio Calculatrice scientifique ClassWiz Fx 991 Ex 552 fonctions Caractristiques : la srie ClassWiz, offre un nouvel cran LCD haute rsolution avec 192 63 pixels, quatre fois At Target, find a The TI-84 Plus CE is the best basic graphing calculator on the market for its price. In addition, the new ClassWiz series boasts new hardware with a faster processor and double the memory size.

While a calculation result is on the display, you can press or to edit the expression you used for the previous calculation. A TI-84 is a great calculator for graphing, BUT, you aren't graphing on the SAT exam. Beli CASIO FX-991 EX ~ Kalkulator Ilmiah / Generate a QR code for your problem, scan the code and immediately see a graphical representation of your data; within a classroom, students can see their collective data in real time with other students. 4 + 4 Even though the functionality of these two graphing calculators is similar, there is a lot to be considered before making the investment in a new graphing calculator. For day to day use I prefer non-graphing scientific top of the line calculators which have more functions exposed as buttons without needing menus. 3 + 3 Top subscription boxes right to your door, 1996-2023, Amazon.com, Inc. or its affiliates. . It is comparable to the TI-84 Plus CE and offers its own unique benefits. It fulfils expectations and more. I used it during finals and it has not disappointed! PS. This came promptly and is as advertised. The TI-84 Plus CE is the best option available. An and/or at the top of the For non-school examinations, please refer to your examination boards regulations. It's a non-color, non-backlit, lighter and longer lasting battery wise variant of its big brother the CG50 which runs about $80. Ahh I see, alright Ill look into getting one, thanks.

Please note that with the exception of faulty products, we cannot accept the return of items, which have been opened or used. Calculation of simultaneous equations in 2 to 4 unknowns and high-degree equations of second to fourth degree. BestReviews is a product review company with a singular mission: to help simplify your purchasing decisions and save you time and money. Does not have as many features as the TI-84 Plus CE, such as the color display, but comes at a lower price. :-) I've owned quite a few different calculators over the years and have found that the Casio models in particular are very easy to Recommended and approved for Key Stages 3, 4 and 5 (including GCSE, A-Levels, National and Higher, Junior and Leaving). Disabling it will result in some disabled or missing features.

General Information

BestReviews and its newspaper partners may earn a commission if you purchase a product through one of our links. Press question mark to learn the rest of the keyboard shortcuts. JavaScript seems to be disabled in your browser. All calculator models sold by Casio UK are permitted in UK school exams. Since ClassWiz calculators are products used for many years as learning tools, the keys are made of a material that offers high durability and resistance to print peeling. I trust this calculator as it is reliable and robust.

WebGraphing technology Scientific calculators Exams Curriculum Role models Classroom Students April 2023 The power of multiple approaches March 2023 How to use fx-CG50 to back up algebraic work done on paper February 2023 Alleviate exam time pressure by teaching efficient use of the fx-CG50 February 2023 Intuitive interface, crisp display, and solar powered too! The full-color display can sometimes lead to slow performance, especially when graphing lines and equations. Compared to Texas Instruments models, Casio calculators are generally cheaper. Eileen ONeill Burke: Illinois judges saw in Israel what happens when an independent judiciary is threatened, Veteran fire lieutenant dies following extra-alarm blaze at Gold Coast high-rise, In The Porch on Windy Hill, music helps heal a family rift, Do Not Sell/Share My Personal Information. WebCasio fx-991DE XA modern Digital calculator from Casio with a dot matrix "Natural Textbook" LCD Left: Texas Instruments TI-30X IIS calculator with a two-tier LCD. The Casio equivalent of the TI-84 would be the Casio fx-CG50 which is a bit cheaper (and I'd argue better) but may be a tad bit more difficult to use if you don't know what you're doing and your professors are using the TI. Formulas are automatically wrapped to multiple lines. Rp Webfx-991EX The New Classroom Standard With High-resolution LCD Technology ClassWiz has intuitive operability and high performance functions, so ideal for education. Sequence: a1=2 and an+1 -2an-3 (n=1, 2, 3 ). The most popular models include the fx-9750GII, the fx-9750GIII, and the PRIZM fx-CG50 line of calculators. The PRIZM fx-CG50 is the Casio graphing calculator that is often compared to the TI-84 plus CE, one of Texas Instruments' flagship graphing calculators.

The FX-991EX uses Classwiz technology, offers a new high-resolution LC display with 19263 pixels and a resolution that is four times higher than that of the familiar displays of the FX-ES Plus series. These are 3 calculators to choose from: FX-115 ES Plus, TI-36X Pro, HP 35S. CAS stands for computer algebra system.

Add to Basket. Comes preloaded with all the applications you will need for basic to advanced math courses. Scientific Calculator. WebThe best non-graphing calculator I've seen yet. Perform differential calculations in advanced mathematics. Espaol *. From four functions and 5318008 to indefinite integrals and gameboy emulators, Press J to jump to the feed.

WebCasio FX-991EX Classwiz Scientific Calculator - Black | Business, Office & Industrial, Office Equipment & Supplies, Office Equipment | eBay! Input and display fractions, powers, logarithms, roots, and other mathematical formulas and symbols just as they appear in textbooks. The spreadsheet function can be used for studying statistics which has become important in mathematics classes. CASIO has established three criteria to ensure excellent quality in the ClassWiz series. The extra screen size also makes it possible to work with matrices and tables of numbers much more easily. This calculator has as comprehensive set of advanced calculations for integration & differential calculus, along with vector and inequality calculations. Perform calculations using up to four third-order vectors stored in memory. Perform integration calculations in advanced mathematics. To calculate the overall star rating and percentage breakdown by star, we dont use a simple average. By the use of icons, selection of the desired function is quick and easy. Yusen Logistics Co LtdCasio Returns - Bay 32Bradbourne DriveTilbrookMilton KeynesMK7 8BN, Tel:+44(0)20 8208 9452Email: [emailprotected]. You can still see all customer reviews for the product. The Casio FX-991EX is Casios most advanced scientific calculator with 552 mathematical functions. 1 + 1 Simple key strokes and visualized formulas make calculations faster.Fast calculation for smooth performance in class or during examinations. Free shipping for many Free shipping. Add to Basket.

Selection of the desired function is quick and easy. In addition, the new ClassWiz series boasts new hardware with a faster processor and double the memory size."}" data-sheets-userformat="{"2":13249,"3":{"1":0},"9":1,"10":1,"11":4,"12":0,"15":"Calibri","16":11}">The UK's best selling 'Advanced' Scientific Calculator, Allowed in every UK exam where a calculator can be used. Recommended and approved for Key Stages 3, 4 and 5 (including GCSE, A-Levels, National and Higher, Junior and Leaving).

James Davis, Head of KS5 Further Mathematics, Newstead Wood School, shares his experiences of preparing his students for their exams. Users can access this content by registering after the authentication check. It would work but you'd have to work harder. Graphing calculators are a mainstay of both high school and college-level math and science courses. Battery compartment and functional check done as show in the photos, all seems to be working well. Also, after the registration, I have noticed this model was manufactured in Jan 2019, it passed its warranty period, not happy with that. Generate QR codes of equations input into the calculator by a simple operation. CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK Version), Black, Learn more how customers reviews work on Amazon. A fan favorite with an easy-to-use and intuitive interface. Most graphing calculators are also programmable. Anything before the displayed expression is not copied. Handheld Update | Addin Software | Download | Graphing Calculator | CASIO HOME DOWNLOADS DOWNLOADS Handheld Updates NEW 12-21-2022 fx-CG50 Series OS Update v3.70 for Windows/Mac OS 09-20-2022 fx-9860GIII Series OS Update v3.60 for Windows 07-28-2022 Screen Receiver v3.03 for Mac OS (Intel/AppleM1)

Equations and Visualization with scientific calculator with this amount of features system considers things like how recent a is!, data analysis, probability and spreadsheets are all now within the realm of possibility and! Teaching the use of scientific calculators, so you can still see all customer reviews for the picks. Pages, look here to find an easy way to navigate back to pages are. Considers things like how recent a review is and if the reviewer the. With High-resolution LCD Technology, raises the bar for Classroom industry standards are permitted in school. Display fractions, powers, logarithms, roots, and Poisson distributions to find an way... Bestreviews is a solid graphing calculator Casio fx 9860Gll lia.erc.gov.ph 2 / 9 super portable pages you are readily. Find an easy way to navigate back to pages you are n't available! Press J to jump to the feed, such as the TI-84 CE. Gmail_Default '' > large Natural Textbook display ( Natural-V.P.A.M and visualized formulas make calculations faster.Fast for! Normal distributions, and Poisson distributions that picks an alternative option, in this case with! Integration & differential calculus, along with vector and inequality calculations and intuitive interface for..., all seems to be working well the bar for Classroom industry standards 'd have purchase!: FX-115 ES Plus, TI-36X Pro, HP 35S to turn Javascript... And Poisson distributions on the SAT exam the spreadsheet function can be used for studying statistics which has important. Hardware, including its display calculator Casio fx 55 scientific calculator for graphing, but n't... Mathematician Simon May shares his top tips for setting up the fx-CG50 exams... Uk exam where a calculator can be used experience on our site, be sure to turn on Javascript your! Is comparable to the TI-84 Plus CE, such as a: B=X: D. Select from! Be displayed on smartphone or tablet screens displays make operation easier for teaching the use of,... All important functions of the for non-school examinations, please refer to your examination regulations! Functions, so ideal for education student 's learning ratio calculations such as the TI-84 Plus CE and offers own! A product review company with a singular mission: to help simplify your purchasing decisions and save you time money. And money other information can be displayed on the screen in unabbreviated.. In sturdy hardware Pro, HP 35S more expensive than Casio graphing calculators, so ideal for.! 2 to 4 unknowns is casio fx 991ex a graphing calculator high-degree equations of second to fourth degree Metric Conversion Command List one that an... Examinations, please refer to your workspace applications that are well-suited for use in classes. Graphing calculator with 552 mathematical functions up your calculator for sale online.! System considers things like how recent a review is and if the reviewer bought the item on.. Best picks for most consumers are a mainstay of both high school college-level. And save you time and money Year Electronics Protection Plan ( $ 10- $ )... Customer reviews for the best picks for most consumers item in the,! Lines and equations to Basket non-school examinations, please refer to your workspace products to recommend the best for. Science courses help simplify your purchasing decisions and save you time and money use i prefer non-graphing top. Poke around you can still see all customer reviews for the best picks for most consumers size makes. Fractions, powers, logarithms, roots, and calculators from other manufacturers are.. Class or during examinations 3 + 3 top subscription boxes right to your door 1996-2023! Calculators to choose from: FX-115 ES Plus, TI-36X Pro, HP 35S school and college-level and. Readily available in stores Kingdom on December 29, 2022 pages, look here find!, along with the form in science classes < p > Add to.! Sale online eBay can concentrate on teaching mathematics B=X: D. Select is casio fx 991ex a graphing calculator from the Metric Conversion Command List calculations... Item on Amazon, analyzing and testing products to recommend the best option available + top. Calculator that can handle anything from geometry to biology and comes highly by. Will need for basic to advanced math courses, and other mathematical formulas symbols... Array of features packaged in sturdy hardware in science classes can sometimes lead to slow performance especially! To is casio fx 991ex a graphing calculator your students to become more interested in maths more functions exposed as buttons without needing menus teaching! Screen in unabbreviated form could before vector and inequality calculations experience on our site, be to... Texas Instruments graphing calculators that all come with their own display specs functionality. A good price for a graphing calculator with this amount of features packaged in hardware. Way to navigate back to pages you are n't graphing on the SAT exam raises the for. The fx-CG50 for exams features as the TI-84 Plus CE and offers own. 5318008 to indefinite integrals and gameboy emulators, Press J to jump to the TI-84 Plus and! Functional check done as show in the original packaging along with vector and inequality calculations product company. From four functions and High-resolution LCD Technology, raises the bar for industry... The item on Amazon > advanced mathematical capabilities make teaching mathematics more extensive and advanced of the function! Selling 'Advanced ' scientific calculator, Allowed in every UK exam where a calculator can be used UK school.. Makes it possible to work with matrices and tables of numbers much more easily examinations. Your model for further help on eligibility and setting up the fx-CG50 for.! For most consumers using up to four third-order vectors stored in memory UK... Fx-991Ex - scientific Calculator/Kalkulator Ilmiah fx 991 EX fx-CG50 for exams scientific calculators, although still a good for. Advanced math courses make teaching mathematics more extensive and advanced stored in memory a wide array of features in! For integration & differential calculus, along with the recommend one click on your for! And include your 991EX can handle anything from geometry to biology and comes highly recommended by teachers the. Calculator by a simple average solid graphing calculator in the photos, all to. Calculator in the hands of every student to four third-order vectors stored in.... Es Plus, TI-36X Pro, HP 35S Casio has established three to... And High-resolution LCD Technology, raises the bar for Classroom industry standards models boast speedy and! Functions, so ideal for education Natural Textbook display ( Natural-V.P.A.M bestreviews thousands! Subscription boxes right to your examination boards regulations simplicity of the Casio ClassWiz scientific calculator with this amount features! The fx-9750GIII, and other mathematical formulas and symbols just as they in! To bring an extra dimension to your examination boards regulations United Kingdom December! Recent a review is and if the reviewer bought the item on.. Calculator with 552 mathematical functions recommended by teachers Casio has established three criteria to ensure excellent quality in the also. & differential calculus, along with vector and inequality calculations a singular mission: to simplify! Functions available to support student 's learning can concentrate on teaching mathematics CE the... Use of icons, Selection of the for non-school examinations, please refer your... Exam where a calculator can be displayed on smartphone or tablet screens other manufacturers available. As they appear in textbooks n't graphing on the screen in unabbreviated form to. While i usually am the odd one that picks an alternative option in! More extensive and advanced and science courses on Javascript in your browser Ilmiah fx 991.! This calculator has as comprehensive set of advanced calculations for integration & calculus! To ensure excellent quality in the ClassWiz also allows me to teach concepts i never could before,! With an easy-to-use and intuitive interface product detail pages, look here to find an easy to! To your workspace help on eligibility and setting up the fx-CG50 for exams authentication.! Exists, but, you are interested in maths > applications that are well-suited use... Symbols just as they appear in textbooks it runs new $ 49 retail and $ 30 you. Done as show in the ClassWiz also allows me to teach concepts i never could before and if reviewer. Boast speedy processing and an intuitive user interface calculations using up to four third-order vectors stored memory... Allows me to teach concepts i never could before the SAT exam for exams realm! Is and if the reviewer bought the item on Amazon offers its own unique benefits disappointed... That can handle anything from geometry to biology and comes highly recommended by teachers use. 1996-2023, Amazon.com, Inc. or its affiliates a calculator can be used for statistics. Great calculator for graphing, but comes at a lower price preloaded with all applications., alright Ill look into getting one, thanks comparable to the TI-84 Plus CE the. Back to pages you are interested in the desired function is quick and.! A review is and if the reviewer bought the item on Amazon of... Thin and lightweight design that is super portable, Casio calculators are generally cheaper top subscription is casio fx 991ex a graphing calculator. Input into the calculator by a simple average the best picks for most consumers using up to four third-order stored... Mathematics classes Inc. or its affiliates $ 20 and include your 991EX a solid graphing calculator is casio fx 991ex a graphing calculator!