The Casio FX-991EX is an advanced scientific calculator designed for students and professionals alike, offering a powerful array of features to meet all your mathematical needs. With its sleek design and intuitive interface, this calculator is perfect for everything from basic arithmetic to complex calculations.

Equipped with a high-resolution LCD screen, the FX-991EX displays fractions, formulas, and equations in their natural form, making it easier to understand and analyze your work. It supports over 500 functions, including calculus, statistics, linear algebra, and matrix operations, providing the versatility required for various subjects.

The Casio FX-991EX also features a spreadsheet functionality, allowing you to create and analyze data efficiently. With its solar and battery power options, you can rely on this calculator to perform optimally in any environment.

Main functions;

Variables List.
Prime Factorization.
Random Integers.
Coordinate Transformation.
Power Calculation.
Trigonometry.
Fraction Calculations.
Combination And Permutation.
9 Variables.
Statistics (List-Based STAT Data Editor, Standard Deviation, Regression Analysis, Statistics List).
Table Function.
UNDO.
Digit Separator.
Multiline Display.

Additional functions;

Spreadsheet Calculations.
Integration Calculations.
Differential Calculations.
CALC Function.
SOLVE Function.
Complex Number Calculations.
Base-N Calculation.
Equation Calculations.
Matrix Calculations.
Vector Calculations.
Scientific Constants.
Metric Conversions.
Advanced Statistical Distribution Calculations.
Inequality Calculations.
Ratio Calculations.
QR Code.
Engineering Symbol Calculations.

SPECIFICATIONS;

New Icon Display;

Classwiz Series
*The Photo Shows The Fx-991EX

ES PLUS Series

Innovative input method;

- List display

Easy-To-Use;

Name: CASIO Scientific Calculators FX-991EX
SKU: 3842
Availability: InStock

Superb Usability That Takes Full Advantage Of The Improved Display Capabilities Makes The Interface Easy To Use In Classrooms

Intuitive icon display;

The Use Of Icons On The Menu Screen Improves Viewability.
Selection Of The Desired Function Is Quick And Easy.

ClassWiz Series
*The Photo Shows The Fx-991EX

ES PLUS Series

Unabbreviated English display;

Nearly All English Words Are Displayed On The Screen In Unabbreviated Form.

ClassWiz Series
*Messages Are Spelled Out (Not Abbreviated)

ES PLUS Series

Interactive format;

Interactive Menu Display Realizes More Intuitive Operation.

Natural Textbook Display;

Input And Display Fractions, Powers, Logarithms, Roots, And Other Mathematical Formulas And Symbols Just As They Appear In Textbooks.

MS Series

Newly designed body for the best use of calculation;

Featuring Intelligent Design And An Elegant Texture

Comes With Slide-On Hard Case

Special Surface Processing
A Special Surface Process Applied To The Body Results In An Elegant Texture And Design.
Metallic Keys
(Fx-991EX/570EX Only)

The Stylish Look And Feel Of Metal Imparts A Sense Of Luxury.
Key Functions Arranged By Color
The Functions Assigned To Keys Are Color-Coded To Facilitate Key Operation.
Easy-To-Understand Key Notation
The Key Notation, Like The Display Format, Uses Signs And Symbols Like Those Found In Mathematics Textbooks. This Natural Interface Makes Input Fast And Easy.
Thin Rounded Body
The Thin, Smoothly Rounded Body Fits The Hand Perfectly.

Easy-To-Study;

A High-Performance Processor And Twice The Memory Of Previous Models
Ensure Speedy Operation And Superior Computational Power.

High performance effective for education;

High-resolution display;

192 × 63-Dot Display.
Clear Display Of Equations And Messages
High-speed calculation;

Fast Calculation For Smooth Performance In Class Or During Examinations
Data capacity for Statistics;

Capacity To Process 160 Statistical Data Items
High-performance functions;

• Use Of Spreadsheets
• 4 × 4 Matrix Calculation

List display function for thorough, speedy learning;

Variables And Statistical Calculation Results Stored In Memory Can Be Displayed In Lists. There’s No Need To Recall And Confirm Individual Values As With Previous Models.

High computational competence for performing even advanced mathematics;

Classwiz Contains Calculation Functions That Support Even Advanced Mathematical Operations, Including Spreadsheet Calculations, 4 X 4 Matrix Calculations, Calculation Of Simultaneous Equations With Four Unknowns And Quartic Equations, And Advanced Statistical Distribution Calculations.

Effective Learning For Advanced Mathematics;

Even Advanced Mathematical Calculations Are Simple To Perform And
Functions That Take Advantage Of Previous Unavailable Display Capabilities
Are Now Possible

Spreadsheet calculations;

Statistics;

The Spreadsheet Function Can Be Used For Studying Statistics Which Has Become Important In Mathematics Classes

Recursion;

In Addition, The Spreadsheet Function Makes It Possible To Enter Recursive Formulas

Riemann Integral;

Calculation Using Advanced Riemann Functions Is Also Possible

The Spreadsheet Function Makes It Easy To Use Real-World Data Even In The Classroom, Enabling Students To Effectively Study Statistical Processing

Advanced statistical distribution calculations;

This Function Makes It Possible To Perform Several Different Types Of Distribution Calculations Such As Binomial Probability.

Binomial probability;
Matrix calculations;

This Function Makes It Possible To Perform Matrix Calculations Of Up To 4 Rows By 4 Columns.

4×4 Matrix Calculation
- Other newly realized calculations;
  
  Classwiz Supports Other Advanced Mathematical Operations Including
  - Simultaneous Linear Equations In 2 To 4 Unknowns
  - High-Degree Equations Of Second To Fourth Degree
  - Second-Degree To Fourth-Degree Inequalities
Online Visualization Service Using QR Code;
The Input Formula And Data Are Converted Into A QR Code Matching The Settings On The Calculator, Then Displayed On The Calculator Screen.
Display Numerical Formulas And Graphs And Use Them In Study By Reading QR Codes With An Application On A Smartphone, Tablet, Or Other Similar Device. (Fx-991EX/570EX Only)

Convert The Numerical Formula Into A QR Code!
- Visualization With Graphs
  
  Input Formula
  
  Table
  
  QR Code
  
  Display Graph
  
  Makes Formulas Visually Understandable
- Easy Formula Input
  
  Input Formula
  
  Calculation Result
  
  QR Code
  
  Display Formula
  
  Promotes Fast, Efficient Report Writing
- Quick User Manual Call-Up
  
  Display The Menu
  
  QR Code
  
  Display The Manual
  
  Makes Learning To Operate The Calculator Fast And Easy
  
  A comprehensive set of advanced functions unique to CASIO scientific calculators;
  
  Spreadsheet calculations;
  
  Useful For Learning Statistics. Up To 5 Columns × 45 Rows (Maximum Of 170 Data Items)
  
  Matrix calculations;
  
  Perform Calculations With Matrices Of Up To 4 Rows And 4 Columns.
  
  Vector calculations;
  
  Perform Calculations Using Up To Four Third-Order Vectors Stored In Memory.
  
  Multiline display;
  
  Formulas Are Automatically Wrapped To Multiple Lines.* *In Linear Input Mode
  
  Integration calculations;
  
  Perform Integration Calculations In Advanced Mathematics.
  
  Differential calculations;
  
  Perform Differential Calculations In Advanced Mathematics.
  
  Equation calculations;
  
  Calculation Of Simultaneous Equations In 2 To 4 Unknowns And High-Degree Equations Of Second To Fourth Degree
  
  Inequality calculations;
  
  Solve Second-Degree To Fourth-Degree Inequalities.
  
  Advanced statistical distribution calculations;
  
  Perform Calculations Involving Normal Distributions, Binomial Distributions, And Poisson Distributions.
  
  Ratio calculations;
  
  Perform Ratio Calculations Such As A:B=X:D.
  
  Metric conversions;
  
  Select Units From The Metric Conversion Command List.
  
  Scientific constants;
  
  Select Scientific Constants From The Scientific Constant Table.
  
  Variables list;
  
  One-Touch List Display
  
  Statistics list;
  
  Displays Six Rows At Once.
  
  Digit separator;
  
  Separation Every Three Digits Makes Even Large Numbers Easy To Read.
  
  Engineering symbols;
  
  Perform Engineering Calculations That Include Symbols Such As K, M, M, And N.