Casio fx-991ES Display Scientific Calculator
Introduction
The Casio fx-991ES Display Scientific Calculator is a highly versatile and feature-rich calculator designed to meet the needs of students, engineers, scientists, and professionals. It offers a wide range of advanced mathematical and scientific functions, making it an ideal tool for solving complex equations, performing statistical analysis, and handling various mathematical tasks with precision.
What’s in the Box
Typically, the Casio fx-991ES Display Scientific Calculator package includes:
- Casio fx-991ES calculator unit
- Protective slide-on hard case
- User manual and quick reference guide
Specifications
- Display: Two-line, multi-replay natural textbook display
- Number of Digits: 10+2
- Entry Logic: Algebraic
- Functions: Over 570 scientific functions
- Power Source: Solar and battery (with automatic shutoff)
- Memory: Variable storage, equation solver, and matrix calculations
- Modes: Normal, STAT, DRG, MATRIX, VECTOR, TABLE, and more
- Fraction Features: Fraction calculations and fraction/decimal conversions
- Equation Solver: Yes, for polynomial equations
- Notation Modes: Scientific, engineering, and fixed
- Dimensions: Approximately 6.2 x 3.2 x 0.6 inches (158 x 82 x 13 mm)
- Weight: Approximately 3.35 ounces (95 grams)
Key Features
- Large, easy-to-read two-line display with natural textbook-like input and output.
- Extensive functionality with over 570 scientific functions, including trigonometry, calculus, statistics, and more.
- Multi-replay function for reviewing and editing previous calculations.
- Equation solver for solving polynomial equations.
- Support for complex number calculations.
- Matrix and vector calculations.
- Fraction calculations and conversion between fractions and decimals.
- Solar-powered with battery backup for extended use.
- Built-in unit conversion for various measurement units.
- Protective hard case included for durability during transport.
- Multiple operating modes, including Normal, STAT, DRG (degree/radian/grad), MATRIX, VECTOR, TABLE, and more.
FAQs
What is the Casio fx-991ES Display Scientific Calculator?
The Casio fx-991ES is a scientific calculator with a multi-line display, capable of performing various mathematical calculations, including complex equations, statistics, and trigonometric functions.
What kind of display does the calculator have?
The calculator features a multi-line, natural textbook display, allowing users to see expressions and results exactly as they appear in textbooks.
What functions and operations can the calculator perform?
The Casio fx-991ES can handle a wide range of functions, including arithmetic, algebraic, calculus, and statistical operations. It can also perform matrix calculations, equation solving, and complex number computations.
Is the calculator solar-powered or battery-operated?
The calculator is typically powered by solar energy and includes a backup battery to ensure continuous operation even in low-light conditions.
Can I use this calculator for standardized tests and exams?
Yes, the Casio fx-991ES is approved for use in many standardized tests and exams, including SAT, ACT, and AP exams. However, it's essential to check the specific rules of the exam you plan to take.
Does the calculator have a user-friendly interface?
Yes, the calculator is designed with a user-friendly interface, featuring easy-to-navigate menus and buttons for efficient and intuitive operation.
Is the calculator suitable for students, professionals, and engineers?
Yes, the Casio fx-991ES is suitable for students, professionals, engineers, and anyone requiring advanced mathematical calculations. Its versatility makes it a popular choice for various fields.
Can I store equations and calculations for future reference?
The calculator allows users to store and recall equations and calculations, enabling convenient review and reference of previous work.
Is the calculator durable and built to last?
Casio calculators are known for their durability and reliability, ensuring that the calculator can withstand regular use and last for an extended period.
Does the calculator come with a protective case or cover?
Some versions of the Casio fx-991ES may include a protective case or cover to safeguard the calculator when not in use and during transportation.
Can I perform unit conversions and statistical calculations with this calculator?
Yes, the calculator supports unit conversions, statistical calculations, and various other mathematical functions, making it a versatile tool for a wide range of applications.
Is there a warranty provided with the Casio fx-991ES calculator?
Warranty coverage may vary by the seller and region. It's advisable to check the warranty information provided by the manufacturer or retailer at the time of purchase.
Are software updates available for the calculator?
Casio may release software updates for their calculators to enhance functionality and address any issues. Users can check the official Casio website for information on available updates.
Can I use the calculator for programming or coding tasks?
The Casio fx-991ES is primarily designed for mathematical calculations and may not have programming capabilities. It's recommended to use dedicated programming tools for coding tasks.
Where can I find the user manual or additional resources for the calculator?
The user manual and additional resources, such as tutorials and guides, are typically available on the Casio official website or included in the packaging when purchasing the calculator.