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Casio FX-991ES Plus – Scientific Calculator with Natural Textbook Display The Casio FX-991ES Plus is a powerful and reliable scientific calculator designed for students, engineers, and professionals who need accuracy and ease of use. Featuring Casio’s Natural Textbook Display (NTD), it allows expressions and results to appear just as they do in textbooks — making calculations easy to read and understand. Equipped with 417 functions, including fractions, statistics, complex numbers, matrices, and equation solving, the FX-991ES Plus is ideal for mathematics, physics, engineering, and accounting tasks. Its dual power system (solar + battery) ensures consistent performance anywhere, anytime. With its durable keys, large display, and lightweight design, this calculator is built for long-lasting classroom or office use. Trusted worldwide, the Casio FX-991ES Plus combines speed, precision, and user-friendly operation in one smart device.
