📚 IGCSE CIE Maths: Calculator Exam Guide & FAQs | IGCSE CIE 数学：计算器使用考场指南与常见问题
Knowing how to use your calculator properly in the IGCSE CIE Mathematics exam is just as important as knowing the maths itself. This guide walks you through the essential rules, settings, shortcuts and troubleshooting tips so you can walk into the exam hall confident and prepared.
在 IGCSE CIE 数学考试中，正确使用计算器的能力与掌握数学知识本身同样重要。本指南将带你梳理所有关键的考场规定、设置、快捷操作以及故障排除技巧，让你自信满满地走进考场。
1. Which Papers Allow a Calculator? | 哪几张试卷可以使用计算器？
For CIE IGCSE Mathematics (0580), calculators are allowed in Paper 2 (Extended) and Paper 4 (Extended), as well as in Paper 2 (Core) and Paper 4 (Core). Papers 1 and 3, both Core and Extended, are strictly non-calculator. If you are sitting Additional Mathematics (0606), both papers permit calculators. Always check the front cover of your question paper for confirmation.
对于 CIE IGCSE 数学 (0580)，扩展课程的试卷二和试卷四以及核心课程的试卷二和试卷四允许使用计算器。试卷一和试卷三（核心与扩展）严格禁止使用计算器。如果你参加的是附加数学 (0606)，两张试卷都允许使用计算器。考前务必核对试卷封面上的说明。
2. Approved Calculator Features and Restrictions | 允许的计算器功能与限制
CIE does not produce an official list of approved calculator models. Instead, your calculator must be non-programmable and must not perform symbolic algebra manipulation, differentiation or integration. Graphical calculators are generally not allowed unless the centre has obtained special permission and the calculator is put into a dedicated exam mode that disables prohibited functions.
CIE 不会公布一份官方的计算器型号清单。你的计算器必须是非可编程的，且不能进行符号代数运算、求导或积分。图形计算器通常不允许使用，除非考点获得了特殊许可，并且计算器已被设置为专门的考试模式，禁用了所有违禁功能。
Popular acceptable models include the Casio fx-991EX (or fx-991CW), Casio fx-85GT CW, and many scientific calculators from Sharp and TI that lack CAS (Computer Algebra System) functionalities. If in doubt, show your calculator to your teacher well before the exam.
常用的合规型号包括 Casio fx-991EX（或 fx-991CW）、Casio fx-85GT CW，以及许多来自夏普和德州仪器且不具备计算机代数系统功能的科学计算器。如有疑问，可在考前尽早向老师出示你的计算器。
3. Must-Do Settings Before the Exam | 考前必须完成的设置
Set the angle mode to degrees (D or DEG), not radians or gradians, unless the question specifically requires radians. This is the most common cause of incorrect trigonometric answers. You can usually switch modes by pressing the MODE or SETUP key and selecting “Deg”.
务必将角度单位设置为度数（D 或 DEG），而不是弧度或梯度，除非题目明确要求使用弧度。这是导致三角函数答案错误的最常见原因。你通常可以按 MODE 或 SETUP 键并选择 “Deg” 来切换模式。
Choose MathIO display mode if available, so that fractions, surds and π are shown naturally. For decimal answers, switch to Norm 1 or Norm 2 to control scientific notation. Avoid Fix mode unless the question instructs you to give answers to a certain number of decimal places – and remember to clear it afterwards.
如果有 MathIO 显示模式，请选择该模式，以便自然地显示分数、根式和 π。对于小数答案，可切换到 Norm 1 或 Norm 2，以控制科学记数法的显示。避免使用 Fix 模式，除非题目要求答案保留特定小数位数——并且记得在用完后将其清除。
Set the calculator to its standard memory state: clear any stored variables (like A, B, X) and reset statistical data. On a Casio, go to MODE, select “STAT”, and clear any old data, or perform a full setup reset if allowed by your centre.
将计算器恢复到标准内存状态：清除所有存储变量（如 A、B、X），并重置统计数据。在 Casio 计算器上，可进入 MODE，选择 “STAT”，清除旧数据，或者如果考点允许，直接进行完整的设置重置。
4. Clearing Memory and Exam Regulations | 清除内存与考场规定
There is no universal CIE rule that forces you to clear all memory, but many exam centres require that calculators are reset before the exam to remove any stored formulas or programmes. If you use programmable functions (like the spreadsheet or equation solver memory on a non-programmable calculator), delete those before entering the hall.
虽然没有一条统一的 CIE 规定强制要求你清除所有内存，但许多考点要求考生在考前重置计算器，以移除任何存储的公式或程序。如果你使用了可编程功能（例如非可编程计算器上的电子表格或方程求解器内存），在进入考场前请将其删除。
Do not attempt to store entire formulae or notes inside the calculator. This could be treated as malpractice. A reset via the “Reset All” option (often used by holding down certain keys) is a safe and quick way to ensure compliance.
不要试图在计算器中存储完整的公式或笔记。这可能被认定为违规行为。通过“Reset All”选项进行重置（通常需要按住某些按键）是一种既安全又快捷的合规方式。
5. Common Calculator Mistakes and How to Avoid Them | 常见计算器使用误区及避免方法
Misunderstanding order of operations: When computing something like 8 + 2 × 3, the calculator follows BIDMAS, giving 14. But if you type 8 + 2 then × 3, you may get 30 if you press equals prematurely. Always type the entire expression before pressing =, or use brackets deliberately.
误解运算顺序：计算类似 8 + 2 × 3 的算式时，计算器会遵循 BIDMAS 规则，得出 14。但如果你先输入 8 + 2，接着按 × 3，可能会因为过早按等号而得到 30。务必在按等号之前输入完整表达式，或主动使用括号。
Forgetting to close brackets: A missing bracket leads to syntax errors or wrong answers. Make it a habit to count opening and closing brackets. The calculator’s bracket indicator can help.
忘记关闭括号：缺少括号会导致语法错误或错误答案。养成计算开闭括号数量的习惯。计算器上的括号指示器可助你一臂之力。
Trigonometry mode mismatch: Using radians instead of degrees changes sine values dramatically. Always do a quick sanity check: sin(30) should equal 0.5 if in degree mode.
三角函数模式不匹配：使用弧度而非度数会极大地改变正弦值。务必做一个快速合理性检查：如果是度数模式，sin(30) 应当等于 0.5。
6. Using the Calculator Efficiently for IGCSE Topics | 针对 IGCSE 各专题的高效计算器用法
Solving equations: The SOLVE function (on models like fx-991EX) can find unknowns in equations such as 2x + 5 = 3x – 2. Enter the equation using the ALPHA key for x, then press SHIFT + SOLVE. Always provide an initial guess; 0 or 1 usually works. The numerical solution is acceptable unless an algebraic method is specifically required.
求解方程：SOLVE 功能（在 fx-991EX 等机型上）可以求出像 2x + 5 = 3x – 2 这类方程中的未知数。用 ALPHA 键输入 x 对应的方程，然后按 SHIFT + SOLVE。始终给出一个初始猜测值；0 或 1 通常可行。数值解是可接受的，除非题目明确要求使用代数方法。
Table mode for graphs: Use TABLE mode to generate x-y value pairs quickly. This helps when plotting graphs or finding limits of sequences. Enter the function f(x), set a start, end and step, and the calculator outputs the table.
表格模式用于图像：使用 TABLE 模式快速生成 x-y 数值对。在绘制图像或寻找数列极限时很有帮助。输入函数 f(x)，设置起始值、终止值和步长，计算器便会输出表格。
Prime factorisation: The FACT function breaks a number into prime factors instantly, handy for HCF and LCM problems. Simply type the number and press =, then SHIFT + FACT (where available).
质因数分解：FACT 功能可瞬间将一个数分解为质因数，对于 HCF 和 LCM 问题非常方便。只需输入数字并按 =，然后按 SHIFT + FACT（若有此功能）。
Statistics: Use STAT mode for ungrouped and grouped frequency data. Enter data in the list, then retrieve mean, standard deviation, median and quartiles via the STAT menu. Remember to exit STAT mode after finishing to avoid interfering with other calculations.
统计学：使用 STAT 模式处理未分组和分组频率数据。在列表中输入数据，然后通过 STAT 菜单获取均值、标准差、中位数和四分位数。完成后记得退出 STAT 模式，以免干扰其他计算。
7. Checking Your Answers with the Calculator | 用计算器检查答案
Always double-check arithmetic by doing the calculation again in a different order or by using inverse operations. For example, after finding 45 × 0.82, divide the answer by 0.82 to see if you get 45.
务必用不同顺序或逆运算重新计算一遍，以检查算术错误。例如，求出 45 × 0.82 的结果后，用其结果除以 0.82，看是否得到 45。
Verify solutions to equations by plugging the value back into the original equation using the replay function. Store the candidate answer in a variable (e.g., X) and then evaluate the left-hand and right-hand sides to see if they match.
将解回代原方程来验证答案，可利用重放功能。将备选答案存入一个变量（如 X），然后分别计算方程左右两边的值，看是否相等。
Use the calculator’s memory to store intermediate results to avoid rounding errors. The Ans key is especially powerful for multi-step problems where rounding is critical.
利用计算器内存存储中间结果，以避免舍入误差。Ans 键在需要严格处理舍入的多步问题中尤其有用。
8. Troubleshooting During the Exam | 考试中的故障排除
Calculator freezes or becomes unresponsive: First, try pressing the AC/ON key firmly. If that fails, use the reset button at the back (a paperclip may be needed – check with an invigilator before bringing any tool). Some calculators recover by pressing SHIFT + 7 + ON or similar key combinations; ensure you have practised this.
计算器冻结或无响应：首先，尝试用力按 AC/ON 键。如果无效，使用背面的复位按钮（可能需要回形针——携带任何工具前须征得监考老师同意）。某些计算器可通过按 SHIFT + 7 + ON 或类似组合键恢复；请务必提前练习。
Low battery warning: If a low battery indicator appears, your calculator should still function for the remainder of the exam, but always carry a spare set of batteries or a second approved calculator. Check with your exam centre if you are allowed to open the battery compartment.
电量不足警告：如果出现电量不足的提示，计算器通常仍能支撑完整场考试，但请务必携带备用电池或第二个合规的计算器。请向考点确认是否允许你打开电池仓。
The display shows unexpected symbols: This could be because you accidentally activated functions like “SCI” (scientific notation) or “ENG” (engineering notation). Return to Norm mode via SETUP. If symbols persist, perform a full reset.
屏幕显示意外符号：这可能是因为你意外激活了“SCI”（科学记数法）或“ENG”（工程记数法）等功能。通过 SETUP 返回 Norm 模式。如果符号仍然存在，执行完全重置。
9. Can I Use a Graphical or Programmable Calculator? | 我可以使用图形或可编程计算器吗？
In IGCSE Mathematics (0580) and Additional Mathematics (0606), graphical calculators are normally not permitted unless the centre has been granted specific approval and the device is set to an exam mode that locks out CAS, algebraic storage and programming. This mode often displays a visible indicator, such as a padlock icon.
在 IGCSE 数学 (0580) 和附加数学 (0606) 中，图形计算器通常不允许使用，除非考点获得特别批准，且设备已设置为考试模式，该模式会锁定 CAS、代数存储和编程功能。该模式通常会显示一个可见的指示符，例如挂锁图标。
Programmable calculators are prohibited outright. Any calculator on which you can write and run programmes (even simple ones) is not allowed. Stick to a standard scientific calculator, ideally the simplest model that meets all required functions.
可编程计算器是严禁使用的。任何允许你编写并运行程序（即使是简单程序）的计算器都不得使用。坚持使用标准的科学计算器，最好是最简单的、能满足所有需求功能的那一款。
10. Frequently Asked Questions | 常见问题解答
Can I bring a spare calculator? Yes, it is highly recommended. Keep the spare in a clear pouch under your desk. Both must meet the exam regulations. If your main calculator fails, you can use the spare without losing time.
我可以带一个备用计算器吗？ 可以，强烈建议这样做。将备用计算器放在桌子下方的透明袋中。两个计算器都必须符合考试规定。如果主计算器出现故障，你可以立即使用备用计算器，不浪费时间。
Do I need to remove the calculator cover? Most centres require you to leave the cover in your bag. Any notes or formulae attached to the cover would be malpractice. Only the bare calculator is allowed on the desk.
我需要取下计算器保护盖吗？ 多数考点要求考生将盖子留在包里。盖子上的任何笔记或公式都可能被认定为违规。只有计算器本身可以放在桌上。
Is it okay to write on the calculator? No. Do not write or stick labels on the calculator; it must be free of any unauthorised information.
可以在计算器上写字吗？ 不可以。不要在上面书写或粘贴标签；计算器必须没有任何未经授权的信息。
What if I forget to clear the memory? If an invigilator checks and finds stored data, they may ask you to clear it immediately. In extreme cases, it could be reported as malpractice. Get into the habit of clearing before every exam.
如果我忘记清除内存怎么办？ 如果监考老师检查并发现存储了数据，他们可能会要求你立即清除。在极端情况下，这可能会被报告为违规行为。养成每次考前清除内存的习惯。
11. Final Exam Day Checklist and Tips | 考前最终检查清单与提示
On exam day, test your calculator: switch it on, check angle mode (DEG), display mode (Norm), clear variables, and confirm the battery indicator is healthy. Pack an extra set of batteries and a second approved calculator. In the first few minutes of the exam, do the sin(30)=0.5 check to confirm everything is set correctly.
考试当天，测试你的计算器：开机，检查角度模式 (DEG)，显示模式 (Norm)，清除变量，并确认电量指示正常。打包一套备用电池和第二个合规计算器。在考试开始的前几分钟，做一个 sin(30)=0.5 的检查，以确保一切设置正确。
During the test, use the replay and edit functions to correct mistakes quickly, and store important intermediate values to memory to avoid retyping. Use the calculator to verify every critical step, but do not rely on it for simple arithmetic that you can confidently do mentally – balance speed and accuracy.
考试过程中，利用重放和编辑功能快速纠正错误，并将重要的中间值存入内存以避免重复输入。用计算器验证每一个关键步骤，但对于你有把握的心算，不要过度依赖计算器——在速度与准确性之间找到平衡。
Finally, remember that a calculator is a tool, not a replacement for reasoning. Always write down your working clearly, even if the calculator did the arithmetic, because method marks are awarded in IGCSE maths.
最后，请记住，计算器是一种工具，不能替代推理思考。即使计算器完成了算术运算，也要清晰写出你的解题步骤，因为 IGCSE 数学的给分包含方法分。
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