Fraction & Scientific

Intuitive Calculators Designed for Your
Student's Math Success.


fx-991EX $19.99

A new high-performance scientific that has higher resolution to increase the amount of information to be displayed and super-fast calculations for high-stakes testing or for performing the most advanced mathematics.

It’s new high resolution LCD screen allows for more information for applications like Spread-sheets and 4X4 matrix calculations. This calculator has a comprehensive set of advanced calculations for integration & differential calculations, along with vector and inequality calculations. For the middle and high school grades, we’ve incorporated basic spreadsheet functionality, ratio and statistical functionality, down to ratio calculation and prime factorization.

Tech Specs

  • Natural Textbook Display
  • Numeric Integration/Differentiation
  • Simultaneous and Polynomial Solver
  • Prime Factorization
  • Matrix and Vector Calculations
  • Complex Number Calculations
  • Summation Notation
  • 47 Built-in Constants
  • 40+ Unit Conversions
  • 2-Function Table of Values [f(x), g(x)]
  • Logarithm of Any Base
  • Combinations and Permutations
  • Linear, Quadratic, Logarithmic, Exponential, Power and Inverse Regressions
  • Simplify Fractions and Roots
  • Variable and Statistical Lists
  • Converts Between Standard Form and a Decimal Approximation
  • Random Integer Generator
  • Review/Edit Previous Entries
  • 9 Constant Memory Locations
  • Coordinate Transformation
  • Table Function for f(x) and g(x)
  • Spreadsheet Calculations
  • Base-n Calculations
  • Equation Calculations
  • Inequality Calculations
  • Ratio Calculations
  • QR Code Generation for Graphical Representation
  • Engineering Symbol Calculations