This is a user manual for a scientific calculator
This manual begins with safety precautions, including proper battery handling, keeping the manual accessible, and keeping batteries away from children. It also explains how to remove and install the protective case safely.
The guide then details the calculator’s functions such as dual‑line display, key layout, preparation steps before calculation, and a wide range of calculation modes—including basic arithmetic, scientific functions, statistics, and engineering calculations—along with troubleshooting tips and error messages. This manual is written in Chinese.
Hold the top of the protective case and pull the calculator out from underneath.
Do not let children touch the battery, keep the manual in an easy‑to‑access place, and avoid exposing the calculator to extreme temperatures or moisture.