CASIO fx-991EX

Features

Intuitive, easy-to-learn icon display
The use of icons on the menu screen improves viewability. Selection of the desired function is quick and easy.

Natural Textbook Display
Input and display fractions, powers, logarithms, roots, and other mathematical formulas and symbols just as they appear in textbooks.

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.

Easy-to-understand English messages and interactive format
Nearly all English words are displayed on the screen in unabbreviated form. Interactive menu display realizes more intuitive operation.

High computational competence for performing even advanced mathematics
ClassWiz contains calculation functions that support even advanced mathematical operations, including spreadsheet calculations, 4 × 4 matrix calculations, calculation of simultaneous equations with four unknowns and quartic equations, and advanced statistical distribution calculations.

Online Visualization Service Using QR Code
Generate QR codes of equations input into the calculator by a simple operation. Graphs and other graphics can be displayed on smartphone or tablet screens.

A comprehensive set of advanced functions unique to CASIO scientific calculators

Specifications

GCSE/AS/A Level
Suitable for Cambridge International Examinations GCSE, AS & A Level.

Number of Functions: 552

Natural textbook display
Display expression same as textbook.

10 + 2 digits
10-digit mantissa + 2-digit exponential display.

Dot-matrix display
A high-resolution screen provides beautiful-looking graphs every time.

Icon menu
Specify the operation you want to perform by selecting an icon or inputting a number.

Multi-replay
Quick and easy recall of previously executed formulas for editing and re-execution.

Solar & Battery
Solar-powered when light is sufficient, battery-powered when light is insufficient.

Plastic keys
Designed and engineered for easy operation.

List-based STAT-data editor
Viewing and editing of input data in list format, showing data groups (x-data, y-data, frequency) and surrounding data.

Metric conversion function
You can convert a number in one unit to a number in a different unit.

 

https://www.casio.com/intl/scientific-calculators/product.FX-991EX/