CASIO Scientific Calculator fx-991ES PLUS

Key Features:

1. Comprehensive Functionality:

   • Scientific Calculations: Supports a wide range of scientific calculations, including fractions, statistics, complex numbers, base arithmetic, linear regression, and standard deviation.
   • Advanced Mathematical Functions: Includes 417 functions, such as matrix calculations, vector calculations, integration, and differentiation.
   • Multi-Replay Function: Allows you to go back through previous calculations step-by-step to edit expressions and recalculate answers.

2. Natural Textbook Display:

   • High-Resolution Display: Shows mathematical expressions as they appear in textbooks, making it easier to enter and read complex calculations.
   • 2-Line Display: The top line shows the expression, and the bottom line shows the result, allowing for easy tracking of calculations.

3. User-Friendly Interface:

   • Ergonomic Design: Comfortable keys and intuitive layout for easy operation.
   • Menu-Driven Interface: Simple navigation through functions using easy-to-understand menus.

4. Durable and Reliable:

   • Solar and Battery Power: Dual power system with solar cell and battery backup ensures reliable operation even in low-light conditions.
   • Durable Construction: Sturdy and reliable build quality for everyday use.

5. Memory and Storage:

   • Multiple Memory Registers: Stores multiple variables and constants for quick access during calculations.
   • Equation Recall: Easily recall previous equations and results for review and further calculations.

Detailed Specifications:

1. Display:

   • Type: LCD
   • Lines: 2-line display
   • Digits: 10+2 digits (mantissa + exponent)
   • Natural Textbook Display: Yes

2. Power:

   • Solar Cell: Yes
   • Battery: 1 x LR44 (included)

3. Dimensions and Weight:

   • Size: 13.7mm x 80mm x 161mm
   • Weight: 95g

4. Functions:

   • Total Functions: 417
   • Basic Calculations: Addition, subtraction, multiplication, division
   • Scientific Functions: Trigonometric, logarithmic, exponential, hyperbolic functions
   • Advanced Functions: Integration, differentiation, matrix calculations, vector calculations
   • Statistical Calculations: Standard deviation, regression analysis
   • Complex Number Calculations: Yes
   • Base-N Calculations: Binary, octal, hexadecimal

5. Additional Features:

   • Multi-Replay Function: Yes
   • Equation Recall: Yes
   • Natural Textbook Display: Yes

What's in the Box:

• CASIO Scientific Calculator fx-991ES PLUS
• Protective Hard Case
• 1 x LR44 Battery (pre-installed)