**便携式计算器：选购与使用指南** 一、选购指南 1. 需求分析 在购买便携式计算器前，首先要明确自己的需求。是要用于基本算术运算，还是需要具备更高级的统计、编程功能？明确需求后，才能选择适合的计算器类型。 2. 类型选择 （1）基础型：适用于日常算术运算，价格相对较低。 （2）科学型：适合科学计算、工程计算等，具备多种函数和统计功能。 （3）编程型：适用于编程和软件开发人员，功能强大但价格较高。 3. 功能与性能 考虑计算器的显示屏幕大小、键盘布局、电池续航能力等。选择时要注意产品的性能指标，如处理器速度、内存大小等。 4. 品牌与质量 选择知名品牌，质量更有保障。同时，注意产品的售后服务和维修便利性。 5. 价格考量 根据自身预算，在满足需求的前提下，选择性价比高的产品。

二、使用指南

1. 初次使用 阅读产品说明书，了解计算器的基本功能和操作方法。掌握开关机、输入、输出等基本操作。 2. 基础操作 掌握基本的算术运算、函数运算等操作方法。对于科学型和编程型计算器，还需学习如何使用高级功能。 3. 注意事项 （1）避免在潮湿、高温或阳光直射的环境下使用。 （2）定期清洁计算器，保持其良好状态。 （4）避免将计算器暴露在磁场或静电场中，以免损坏内部元件。 （5）避免随意拆卸或修理计算器，如遇故障，请联系专业人员进行维修。 三、翻译成英文： Portable Calculator: Shopping and Usage Guide I. Shopping Guide 1. Need Analysis Before purchasing a portable calculator, it is necessary to clarify your needs. Do you need it for basic arithmetic operations or more advanced statistics and programming functions? After clarifying your needs, you can choose a suitable calculator type.

2. Type Selection (1) Basic model: suitable for daily arithmetic operations, with relatively low prices. (2) Scientific model: suitable for scientific calculations, engineering calculations, etc., with multiple functions and statistical capabilities. (3) Programming model: suitable for programmers and software developers, with powerful functions but higher prices. 3. Function and Performance Consider the display screen size, keyboard layout, battery life, and other factors of the calculator. Pay attention to the performance indicators of the product, such as processor speed and memory size. 4. Brand and Quality Choose a well-known brand for better quality assurance. At the same time, pay attention to the after-sales service and repair convenience of the product. 5. Price Consideration Based on your budget, choose a cost-effective product that meets your needs.

II. Usage Guide 1. Initial Use Read the product manual to understand the basic functions and operating methods of the calculator. Master basic operations such as power on/off, input, and output. 2. Basic Operations Master basic arithmetic operations, function operations, and other operating methods. For scientific and programming calculators, you also need to learn how to use advanced features. 3. Precautions (1) Avoid using the calculator in damp, high-temperature, or direct sunlight environments. (2) Regularly clean the calculator to maintain its good condition. (3) Avoid exposing the calculator to magnetic or static fields to prevent damage to internal components. (4) Avoid dismantling or repairing the calculator without authorization. If there is a fault, please contact a professional for repair.