Key Specifications & Display

• Display Format: Natural Textbook Display (Natural-V.P.A.M.) shows fractions, derivatives, integrals, and sums exactly as they appear in standard textbooks.
• Screen Capacity: Clear 10+2 digit liquid crystal dot matrix display. [1]
• Power Source: Operates entirely on a single AAA battery (R03) (unlike its sister model, the fx-991ES Plus, which is dual-powered by solar/battery).
• Design: Ergonomic, lightweight black body featuring a sleek rectangular profile with rounded corners and a hard slide-on protective case.

Mathematical Capabilities

The calculator comes packed with 417 built-in functions, making it highly effective for general math, calculus, algebra, and engineering coursework

• Advanced Mathematics: Computes numerical integration, differentiation, summation (Σ), and base-n calculations.
• Structures & Spaces: Handles matrix calculations (up to 3x3) and vector transformations.
• Data & Statistics: Features a robust STAT-data editor for standard deviation, regression analysis, permutations, and combinations.
• Complex Variables: Full support for complex number algebra and solving simultaneous linear or polynomial equations.
• Memory & Storage: Features 9 independent variable memories alongside quick-access Answer (Ans) memory