Scientific Calculator Casio FX-85ES-S PLUS Desktop Black

The Casio FX-85ES-S PLUS Desktop Black is a scientific desktop calculator with a 12-digit LCD display designed for routine and advanced mathematical work. It combines solar and battery power for dependable operation, and its slim black casing includes a protective slide-on cover for transport and storage. The calculator provides a clear natural textbook display and a set of built-in mathematical functions intended to simplify algebraic, trigonometric, statistical and engineering calculations for students and professionals.

Advantages

The device offers a 12-digit display with Natural Textbook Display formatting that shows expressions and results as they appear in textbooks, reducing input and interpretation errors. Dual power (solar with battery backup) ensures continued operation in varied lighting conditions. The compact desktop form factor and protective cover add physical durability and convenience for classroom or office use. A broad range of scientific functions, user-friendly keyboard layout and reliable calculation accuracy support everyday and exam-related tasks.

Suitable for

• Secondary school and university students studying mathematics, physics or engineering
• Teachers and exam supervisors requiring a permitted scientific calculator
• Laboratory or office environments needing quick scientific and statistical calculations
• Home study and homework where a stable desktop calculator is preferred

Key specifications

• Display: 12-digit LCD with Natural Textbook Display formatting
• Power: Dual power — solar cell with battery backup
• Form factor: Desktop layout with protective slide-on cover
• Functions: Built-in algebraic, trigonometric, hyperbolic, logarithmic, exponential and statistical functions
• Input: Tactile keys arranged for quick scientific input
• Dimensions and weight: compact desktop size suitable for a study desk (manufacturer-stated compact dimensions)

How to use

Place the calculator on a stable surface and slide off the protective cover to reveal the keypad and display. Use the numeric and function keys to enter expressions; the Natural Textbook Display will render fractions, roots and exponents in a familiar format. Switch between solar and battery power automatically — ensure adequate ambient light for solar assistance and replace the backup battery following the manufacturer’s indicated procedure when the display dims. For statistical tasks, select the appropriate mode and follow the on-screen prompts to enter datasets and calculate means, standard deviations or regressions. Consult the supplied manual for detailed mode selection and function key mappings.

Usage recommendations

Protect the device from prolonged exposure to high humidity and extreme temperatures. Keep the protective cover on when transporting to avoid key wear. For exam use, verify allowed calculator lists and disable any prohibited features as required by the testing authority.