This document is the user's guide for Casio calculators, providing instructions and functions for models such as fx-82ES, fx-83ES, fx-85ES, fx-300ES, and fx-350ES.
This manual provides safety precautions, operating instructions, and detailed information on the display, calculation modes, and settings for the fx‑82ES, fx‑83ES, fx‑85ES, fx‑300ES, and fx‑350ES calculators. It also includes battery handling, maintenance tips, and troubleshooting guidance.
The document explains how to power the device on and off, adjust contrast, initialize the calculator to its default settings, and replace batteries safely. Technical specifications such as battery type, life, power consumption, operating temperature, dimensions, and weight are listed at the end of the manual. This manual is written in Chinese.