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The Casio FX-991ES Plus (2nd Edition) is a non-programmable scientific calculator with 417 built-in mathematical functions. Natural Textbook Display shows fractions and square roots exactly as they appear in paper-based equations. This updated version replaces the curved body with a rounded rectangular frame and upgrades plastic keys with a metallic finish.
Key Features
- 417 Mathematical Functions: Includes integration, differential, vector, and matrix calculation capabilities. Handles complex engineering math without programmable logic.
- Natural Textbook Display: Dot matrix screen shows 10+2 digits for mantissa and exponent. Equations match textbook formats on screen.
- Solar and Battery Power: Two-way power source using light and an LR44 battery. Stays active during unexpected load shedding.
- 3-Year Warranty: Official Casio coverage for manufacturing defects and hardware failure. Protects the investment against circuit malfunctions.
- Slide-on Hard Case: Removable hard case shields the screen and the keypad. Resists damage from road dust during transport.
Frequently Asked Questions
How to check original Casio FX-991ES Plus 2nd edition?
Genuine units display a QR code on the screen via specific key combinations. This code links to the Casio verification website for authenticity confirmation.
Does Casio FX-991ES Plus have integration?
The hardware supports numerical integration and differential calculus through dedicated function keys. It solves these equations using the 417-function internal library.
Is Casio FX-991ES Plus allowed in HSC exam?
This model is non-programmable and usually meets the requirements for HSC and admission tests. Most educational boards permit its use due to the lack of internal memory storage.
