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ClassWiz / Advanced Scientific / Dual Power
Standard Scientific Calculators

FX-991CW

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Use code BTS20 for 20% off selected lines - Sale price £28.79 The Casio fx-991CW ClassWiz has now been replaced by the fx-991CW+ UK, as the UK’s best-selling Advanced Scientific Calculator. The new fx-991CW+ UK contains additional UK curriculum specific features and functions. •  Approved for Key stages 3, 4 and 5, recommended for Advanced/Further GCSE, A/AS level and Highers. •  Allowed in every UK exam where a calculator can be used. ​ •  Dual powered, solar with battery backup and auto power-off. ​ •  Clip-on protective hard cover included​ •  540+ functions ​ •  Free 3 year guarantee included ​ Other models to consider: ​ If you are studying Further Maths or A-Level maths, we suggest using the fx-CG100 Graphic Calculator, our most powerful and advanced calculator. ​ Reliable and Durable: Built for Learning. Made to Last.​ Cheap alternatives and counterfeit copies may be available, but they often lack the reliability, durability, and curriculum suitability needed for classroom use. Our genuine calculators are built to last, trusted by educators, and suitable for the UK maths curriculum. For the best performance and long-term value, we recommend choosing an authentic Casio product.​ From the inventors the world’s first compact all-electric calculator over 60 years ago, genuine Casio calculators offer the durability, reliability, and UK curriculum compatibility that students and teachers depend on. Choose authentic for quality you can trust.​ Avoid counterfeit and fake products. Buy with confidence from a trusted source​ View our Model Comparison Chart to find the right calculator for you.​ ​The fx-991CW is permitted in all UK calculator exams, further details can be found on the Joint Council for Qualifications calculator FAQ document here .​

Features

Intuitive, approachable new design

High-definition & 4-gradation display

With the 4-gradation display, the current input location is displayed in a darker colour.

Intuitive cursor operation

Simple cursor-based operations and a key layout that follows the natural flow of use.

Natural Textbook Display

Intuitive, easy-to-learn icon display

List display function for thorough, speedy learning

High-speed calculation

Fast calculation for smooth performance in class or during examinations.

Packed with features to encourage learning

Calculator Apps

Easily select a calculator app from the Home screen that is suitable for the type of calculation that you want to perform.

*The image is the display of fx-991CW.

Spreadsheet

Useful for learning statistics, recursive formulas and more.
Handles up to 5 columns x 45 rows (maximum of 170 data items).

Maths Box

The following functions to support maths learning: Dice Roll and Coin Toss for probability simulations.

*Screen images might differ from the final product.

Calculate

General calculations

Statistics

Statistical and regression calculations

Table

Generates a number table based on one or two functions

Equation

Simultaneous equations, higher-order equations, and Solver (function to find the value of any variable contained in an input equation)

Online visualisation service using QR codes

Easily generate QR codes of equations input into the calculator. Graphs and other graphics can be displayed on smartphones or tablets.

1. Input data

2. Generate & scan QR code 

3. Graph on smart device

4. Analyse graph

Variety of functions that are available in calculator apps to support students' learning.

CATALOGUE

The CATALOGUE menu shows Store values to variables categories of commands, functions, and symbols according to the calculator app that you are currently using and the current status of the app (the displayed screen or current settings).

FUNCTION

You can store functions in both the f(x) and g(x) memory.

Examples:

Create a table in the Table app

Call from a spreadsheet

VARIABLE

You can store values to variables and use the variables in calculations.

<Things you can do with the Variable key>

Display the variable list screen

Store values to variables

Use saved values (can be called from any app)

Specifications

Select a location