Επιστημονική αριθμομηχανή Casio FX-87DE Plus 2nd Edition

The Casio FX-87DE Plus 2nd Edition is a pocket scientific calculator with a 12‑digit display arranged in 10 lines and 15 characters per line. It combines battery and solar power for dependable operation in varying light conditions and features a compact black housing designed for everyday portability. The calculator provides the core functions needed for secondary and tertiary level mathematics and science tasks, presented in a clear, multi-line format that helps track expressions and results.

Advantages

The device offers multi-line input and output so users can view expressions and results on the same screen, reducing entry errors and simplifying multi-step calculations. Dual power (battery and solar) extends runtime and minimizes interruptions. The compact form factor and tactile keypad support comfortable one-handed use and transport. The calculator supports a broad set of standard scientific functions required by many educational curricula.

Suitable for

• Secondary school mathematics and science coursework
• College-level basic engineering and physics calculations
• Classroom tests and exam practice where approved
• Home study, homework, and quick on-site calculations

Key specifications

• Display: 12 digits, 10 lines, 15 characters per line
• Power: Battery with solar backup
• Design: Portable pocket-sized housing in black
• Input/Output: Multi-line expression display for clear tracking
• Functions: Standard scientific functions for algebra, trigonometry, statistics and basic engineering calculations

How to use

Turn the calculator on with the power key and enter expressions using the alphanumeric keypad. Use multi-line display to check each step before confirming the final result; edit entries with the backspace or clear keys as needed. Select mode or function keys to switch between calculation types such as statistics, fraction, or trigonometric functions. When not in direct light, ensure the battery backup is functional to maintain operation.

Recommendations

Store the calculator in a protective case when carried in a bag to prevent key wear and screen scratches. For reliable operation, expose the solar panel to light during prolonged use and replace the battery according to the manufacturer’s guidelines or when the display dims. Follow permitted device rules for exams and classes.