CASIO fx-991ES_PLUS-2

Simple and easy to use
Optimal education tools realized throughs design that emphasizes comfort in the hand, legibility, and usability through the pursuit of simplicity

Natural Textbook Display
Features Natural Textbook Display format for displaying equations and calculation result just as they appear in textbooks

Authentic quality
Excellent quality and authentication ensure confidence and peace of mind for use in educational settings

Main functions

>Random integers
>Fraction calculations
>Combination and permutation
>Statistics (List-based STAT data editor, standard deviation, regression analysis)
>9 variables
>Table function
>Comes with new slide-on hard case
>Equation calculations
>Integration/differential calculations
>Matrix calculations
>Vector calculations
>Complex number calculations
>CALC function
>SOLVE function
>Base-n calculation

Specifications

Non-Programmable

Number of Functions : 417

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.

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-991ESPLUS-2/