Casio fx-991ES PLUS-2PK - Scientific Calculator

The Casio fx-991ES PLUS-2PK scientific calculator has been designed for students and professionals seeking precision and ease of use in mathematical calculations. This 2nd edition of the ES PLUS Series provides a natural textbook display, allowing equations and results to appear exactly as in textbooks, ensuring clarity and minimizing errors during study or work. Comfort and usability are prioritized through a lightweight design, legible keys, and an intuitive interface that simplifies complex calculations.

Equipped with 417 functions, this calculator supports advanced mathematics, including matrix, vector, differential, and integration calculations. Statistical analysis is streamlined through a list-based STAT data editor, offering standard deviation, regression, combination, and permutation calculations. Non-programmable and non-graphing, it provides reliable performance for exam use while maintaining authentic Casio quality. A new slide-on hard case ensures safe storage and portability.

Key Features:

• Natural Textbook Display: Equations and results are displayed as they appear in textbooks for easy comprehension.
• Extensive Functions: 417 functions including random integer generation, fractions, matrices, vectors, complex numbers, base-n calculations, differential, and integration.
• Statistical Tools: List-based STAT data editor, standard deviation, regression analysis, combinations, and permutations for advanced statistics.
• Equation & Calculation Tools: CALC and SOLVE functions allow quick and accurate problem solving.
• User-Friendly Design: Lightweight (95 g), comfortable plastic keys, and compact size (161.5 × 77 × 11.1 mm).
• Reliable Power Supply: Dual solar and battery operation with auto power off; battery life of approximately 3 years.
• Memory Functions: 9 variables, independent memory (M/M+/M-), answer memory, and reset functionality.
• Accessories: Slide-on hard case included for protection and portability.

Specifications:

• Type: Non-Programmable, Non-Graphing
• Display: Natural textbook display, dot matrix
• Number of Functions: 417
• Digits: 10 + 2
• Keys: Plastic with negative sign and power off
• Power Supply: Solar & battery
• Battery Life: Approx. 3 years
• Size: 161.5 × 77 × 11.1 mm
• Weight: 95 g
• Memory: 9 variables, independent memory, answer memory
• Calculation Functions: Basic calculations, bracket calculations, fraction calculations, reciprocal, percent, factorial, trigonometric, inverse trigonometric, hyperbolic/inverse hyperbolic, exponential, logarithmic, complex numbers, matrix, vector, differential, integration, base-n calculations, logical operators, coordinate conversion, random number generation, summation, multi-statement commands, replay functions, CALC, and SOLVE.

The Casio fx-991ES PLUS-2PK has been crafted to provide reliability, convenience, and versatility in mathematics and science applications. Its authentic build quality and wide range of functions ensure that students, educators, and professionals can perform advanced calculations efficiently while maintaining accuracy and confidence.