Casio fx-991ES PLUS-2 Scientific Calculator Natural Textbook Display Plastic 417 Functions

Frequently Asked Questions

• Q: What makes the Casio fx-991ES PLUS-2 calculator stand out from other scientific calculators? A: The fx-991ES PLUS-2 stands out with its Natural Textbook Display, which shows mathematical expressions and results exactly as they appear in textbooks, making it easier to understand complex equations. It also boasts an impressive 417 functions, covering advanced calculations like equation solving, matrix and vector operations, complex numbers, and calculus, making it ideal for secondary school through university level studies.
• Q: Is this calculator allowed in important exams like maturity exams? A: Yes, the Casio fx-991ES PLUS-2 is specifically mentioned as being admitted to maturity exams, providing peace of mind for students preparing for their important assessments.
• Q: What types of advanced mathematical functions does this calculator offer? A: This calculator is equipped with 417 functions, including sophisticated capabilities such as equation resolution, calculation of synthesis values and variability indexes, matrix and vector calculation, regression and correlation coefficients, complex number calculations, and integral and differential calculus. It also features a CALC key for temporary formula memory and 40 physical constants.
• Q: How does the 'Natural Textbook Display' benefit users? A: The Natural Textbook Display allows you to input and view mathematical formulas and numbers exactly as you would see them in your textbooks or on paper. This visual clarity helps reduce errors and improves comprehension, especially when dealing with fractions, roots, and other complex notations.
• Q: What are the power sources for the Casio fx-991ES PLUS-2? A: The calculator features a dual power supply system, combining solar power with a backup alkaline button cell (LR-44). This ensures reliable operation in various lighting conditions and provides a long-lasting power source.
• Q: Can this calculator handle complex numbers? A: Yes, the fx-991ES PLUS-2 has dedicated functions for complex number calculations, allowing you to perform operations with imaginary numbers easily.
• Q: What is the purpose of the CALC key? A: The CALC key allows you to store a formula and then substitute different values into it to get results without re-entering the entire expression. This is a significant time-saver for repetitive calculations.
• Q: What kind of bracket functionality does it have? A: The calculator supports 24 levels of brackets, providing ample flexibility for nesting and grouping complex expressions accurately.
• Q: Is this calculator suitable for engineering or advanced science students? A: Absolutely. With its extensive range of functions, including calculus, matrix operations, and statistical analysis, the fx-991ES PLUS-2 is highly suitable for students in engineering, physics, mathematics, and other advanced science disciplines.
• Q: What are the dimensions of the calculator? A: The dimensions of the Casio fx-991ES PLUS-2 are approximately 1.5 cm in height, 7.5 cm in width, and 16.2 cm in length.
• Q: What materials is the calculator made from? A: The calculator is primarily constructed from durable plastic.
• Q: Does the calculator come with a warranty? A: Please refer to the product packaging or our website's warranty section for specific details regarding the warranty period and coverage for the Casio fx-991ES PLUS-2.
• Q: How do I switch between solar and battery power? A: The calculator automatically utilizes solar power when sufficient light is available and switches to the battery power source when needed. There is no manual switching required.
• Q: Can I perform statistical calculations on this calculator? A: Yes, the fx-991ES PLUS-2 is equipped with functions for statistical calculations, including regression and correlation coefficients, as well as calculation of synthesis values and variability indexes.
• Q: Is the display backlit? A: The display on the fx-991ES PLUS-2 is not backlit. However, the Natural Textbook Display is designed for excellent clarity and readability under normal lighting conditions, enhanced by the solar power feature.