# CASIO fx-991EX

## advanced scientific calculator

The fx-991EX is the most advanced scientific calculator available. Advanced functions include calculus, probability distributions, equation solvers, matrices and vectors, and spreadsheets. It uses ClassWiz technology for intuitive menu-driven operation and easy access to results. The fx-991EX offers a high-resolution LC display with 192×63 pixels, four times higher than previous calculators, a faster processor and double the memory.

*bubble_chart*

# Features

## What you can do with a 991EX

*chevron_right*

### Evaluate calculus

Evaluate first derivatives and definite integrals for any single-variable function.

### Calculate statistics such as mean and quartiles from lists. Calculate paired-variable regression.

You can solve it!

### Solve simultaneous linear equations

Solve linear equations in up to 4 unknowns. Answers are given as fractions where appropriate.

### Solve quadratic equations

Solve quadratic, cubic and quartic equations. Answers are given in surd form where appropriate.

### Calculate probability distributions

Calculate probabilities for Normal, Binomial and Poisson distributions.

# Skills

## Learn how to use the fx-991EX

*chevron_right*

*airplay*

# Emulator

## For the big screen

*chevron_right*

## The ClassWiz Emulator

## The ClassWiz Emulator is a software program that emulates the operation of the fx-991EX calculator.

Find out more*create*

# Exams

## Examination Eligibility

*chevron_right*