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Top 10 Casio FX-991EX

Discover our curated selection of high-quality products.

Last update: 29-04-2025

1
Casio FX-991DE X (German)

Casio FX-991DE X (German)

  • Casio FX-991DE X
9.8/10
2
Casio FX-991ES Plus-2nd Edition Scientific Calculator

Casio FX-991ES Plus-2nd Edition Scientific Calculator

  • Redesigned ES PLUS series calculators featuring easy-to-understand Natural Textbook Display, Non-Programmable Scientific Calculator with 417 Functions
  • Stylish design but same function as Casio FX-991ESPLUS 1st edition, 10-digit mantissa + 2-digit exponential display
  • Basic Trigonometrical & Statistics Functions, and many more functions
  • Colour coded keypad for easy key differentiation, Simple and easy to use, Comes with new slide on hard case
9.6/10
3
CATIGA SS-991EX Scientific Calculator with Advanced 550 Functions- Solar & Battery Powered, Multi-Function, High School & College Math, Trigonometry, Statistics, Algebra, Durable, Large Display

CATIGA SS-991EX Scientific Calculator with Advanced 550 Functions- Solar & Battery Powered, Multi-Function, High School & College Math, Trigonometry, Statistics, Algebra, Durable, Large Display

  • 552 FUNCTIONS SCIENTIFIC CALCULATOR: Includes spreadsheet, matrix calculations, statistics, calculus, complex number calculations, equation calculations, standard deviation, vector calculations, permutations and combinations. Perfect for Advanced and Beginner courses including Biology, Chemistry, Physics, Finance and Business.
  • USER FRIENDLY FORMAT: Displays formulas and expressions as they appear in textbooks, simplifying learning and problem-solving. This feature ensures that complex equations are presented in a clear, structured manner, making it easier for users to follow along and verify their work, ultimately enhancing accuracy and understanding in both educational and professional settings
  • LARGE HIGH RESOLUTION SCREEN: The high-resolution LCD display is 32% larger than regular two-line calculators, showing intricate details ideal for advanced operations such as spreadsheets and 4x4 matrix calculations. The spacious screen allows graphs and equations to be displayed simultaneously, enhancing the clarity and precision of your work
  • DUAL POWER SOURCE: Features both solar power and a battery backup, guaranteeing continuous performance for crucial calculations, making it reliable and efficient for use in any environment
  • DURABILITY and QUALITY: Engineered with strong materials, SS-991EX withstands extensive use, providing long-term reliability. If your calculator fails to turn on, try pressing the reset button on the back. For further issues, benefit from our 365-day limited warranty. Contact us, and we'll respond within 24 hours
9.5/10
4
CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black

CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black

  • The UK’s best-selling advanced Scientific calculator.
  • Especially recommended for advanced GCSE, a/as level and higher.
  • This model has now been replaced with the new upgraded FX-991 packed with addtional features
  • 552 Mathematical functions
  • Solar powered with battery backup
9.3/10
5
Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural

Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural

  • Approved for age version
  • Natural display to insert and display numerical expressions as they appear on textbooks
  • 24 brackets
  • Regression and correlation coefficient
  • 2023232324 battery.Solar powered and battery.Dimensions: 1. 4 x 7 7 x 16.2 cm
9.2/10
6
Casio FX-CG50 Graphic Calculator (UK version)

Casio FX-CG50 Graphic Calculator (UK version)

  • This version of the FX-CG50 graphic calculator comes with an English only user manual, and accordingly suits British users only.
  • The fx-CG50 is CASIO's most advanced graphic calculator approved by exam boards of the United Kingdom. Its functionality is a perfect fit for British exam levels from GCSE to A-level Maths, Further Maths and International Baccalaureate (IB)
  • The user-friendly icon menu, function keys and interactive format enable intuitive operation. The large high-resolution colour screen gives exceptional clarity and easily distinguishes different graphs
  • Over 3,000 functions to include; Equation Solvers, Spreadsheets, Graph Solvers, Data Charts, Matrix and Vector Calculations, e-activity, Geometry application, Picture plot and 3D display
  • Includes PC connection cable and slide on hard cover for protection of the screen and keyboard
9.0/10
7
Casio FX-991CW Advanced Scientific Calculator (UK Version)

Casio FX-991CW Advanced Scientific Calculator (UK Version)

  • Casio fx-991 is the UK’s best-selling ‘advanced scientific’ calculator.
  • fx-991 CW is the new upgraded version of the fx-991 EX
  • Allowed in every UK exam where a calculator can be used
  • Approved for Key stages 3, 4 and 5, recommended for Advanced GCSE, A/AS level and Highers
  • Dual powered, solar with battery back up and auto power-off
8.8/10
8
OSALO Scientific Calculator 417 Function 2 Line 10+2 Digits Written Display Solar and Battery Calculators for Students Secondary School College Black (OS 991ES Plus 2nd Edition)

OSALO Scientific Calculator 417 Function 2 Line 10+2 Digits Written Display Solar and Battery Calculators for Students Secondary School College Black (OS 991ES Plus 2nd Edition)

  • 【417 Functions Scientific Calculator】With 417 functions for fractions, exponents, matrix calculations, statistics, integral, algebra, complex number calculations, standard deviation, solving for variables, permutations and combinations, and linear regression, Scientific Calculator covers most of the scientific functions that students from middle school through college will need to use in their courses and on exams. Reading instruction attached will help you know how to use and find these functions.
  • 【Written Display Scientific Calculator】Input expressions and arithmetic operations same as written form in the textbook, which is more easy to read than traditional calculators. The 2 line display shows both input and calculation results,convenient for students to check the calculation process and results.
  • 【Brightness Adjustment Function】The screen brightness can be adjusted by simple operation to get the best display effect, dimming to relieve eye fatigue, brightening to get clearer display results, to improve the calculation efficiency.
  • 【Dual Power Source Electronic Calculator】Solar and battery,double safe uninterruptible power,environmental protection and energy saving advantages.
  • 【Ultra-light & Portable】Weight: 5.1oz. (145g); Size: 164 x 80 x 17(mm)/6.4 x 3.15 x 0.6 7(inch); Material: ABS plastic. With slide-on hard case, convenient to carry it outside and hold it on one hand.
8.6/10
9
Casio fx-991ES Plus C 2nd Edition Calculator

Casio fx-991ES Plus C 2nd Edition Calculator

  • Natural textbook display
  • Numerical Differentiation/ Integration
  • Matrix 4x4 /Vector calculations
  • Two variable Statistical regression
  • Complex numbers
8.3/10
10
Casio FX-991 CW (Model 2024) Scientific Calculator, 540 Functions and Natural Display

Casio FX-991 CW (Model 2024) Scientific Calculator, 540 Functions and Natural Display

  • Scientific calculator with over 540 functions designed for school
  • High resolution natural LCD display with 192 x 63 pixels and icon menu
  • Spreadsheet to study statistics
  • QR code for continuing calculations on PC
  • Solving equations and systems up to 4 equations and matrix calculation 4 x 4
8.1/10

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