CASIO fx-991ES PLUS C 2nd Edition Scientific Calculator – 417 Functions, Natural Textbook Display, Solar & Battery

The CASIO fx-991ES PLUS C 2nd Edition is a versatile non-programmable scientific calculator designed for students, educators, engineers, and professionals who need advanced mathematical and scientific functions. It features 417 functions and CASIO's Natural Textbook Display, allowing fractions, roots, powers, logarithms, and other mathematical expressions to be displayed in a format similar to their appearance in textbooks.

The calculator supports a wide range of advanced calculations, including integration, differential calculations, equation solving, matrix and vector calculations, complex numbers, statistical and regression calculations, Base-N calculations, CALC and SOLVE functions, scientific constants, metric conversions, and table calculations. It also supports inequality and distribution calculations.

The fx-991ES PLUS C uses a dual-power system with a built-in solar cell and LR44 button battery, providing practical everyday operation. Its slim body measures 161.5 × 77 × 11.1 mm and weighs approximately 95 g including the battery, making it convenient to carry between classrooms, offices, and study environments.