📚 IB Mathematics Review Set 26B – Calculator Skills | IB数学复习集26B：计算器技能
Review Set 26B is crafted to strengthen your proficiency with the graphing display calculator (GDC) across all IB Mathematics topics. This revision guide walks you through the core calculator operations, typical pitfalls, and efficient strategies needed for both Analysis and Approaches (AA) and Applications and Interpretation (AI) papers. Whether you are verifying algebraic work, exploring graphical patterns, or running statistical tests, these skills will save time and boost accuracy.
复习集26B旨在加强你在IB数学各个专题中运用图形计算器（GDC）的熟练度。本复习指南将带你系统梳理核心计算器操作、典型误区以及分析与方法（AA）和应用与解释（AI）试卷所需的高效策略。无论你是在验证代数推导、探索图形规律还是执行统计检验，这些技能都能节省时间并提升准确性。
1. Calculator Setup and Mode Essentials | 计算器设置与模式要点
Always begin by checking the angle mode: radians (RAD) for calculus and most graphing work, degrees (DEG) only when the problem explicitly uses degree measure. A mismatched angle setting is one of the most frequent causes of unexpected results in trigonometry and integration.
始终首先检查角度模式：微积分和大多数作图工作使用弧度（RAD），仅当题目明确涉及度数时才切换至角度（DEG）。角度设置不匹配是三角函数和积分计算中最常见的错误来源之一。
Set the number display to FLOAT or to a sensible fixed decimal place, such as 3 or 4, depending on the question's precision requirements. Avoid rounding intermediate values too early, as this can propagate errors through multi-step solutions.
将数字显示设置为浮点（FLOAT）或根据题目精度要求设定合理的小数位数（如3或4位）。避免过早对中间结果进行舍入，否则误差会通过多步求解被放大。
Enable statistical diagnostics, especially the correlation coefficient r and coefficient of determination r², before performing any regression. Without these, you will not be able to fully assess the strength of a model.
在进行回归分析之前，务必开启统计诊断功能，特别是相关系数 r 和决定系数 r²。缺少这些参数将无法充分评价模型的拟合强度。
Configure the graphing window thoughtfully. Use ZOOM Standard as a starting point, then adjust Xmin, Xmax, Ymin, Ymax to capture intercepts, turning points and asymptotes. The ZOOMFIT feature is often helpful for vertical ranges.
精心设置图形窗口。以 ZOOM Standard 作为起点，然后调整 Xmin、Xmax、Ymin、Ymax 以捕捉截距、拐点和渐近线。ZOOMFIT 功能在调整纵轴范围时往往非常有用。
Familiarise yourself with your GDC’s memory management. Clear lists, matrices, and functions from previous sessions to avoid conflict. Many errors arise simply because a forgotten stored value interferes with a new calculation.
熟悉你的图形计算器内存管理功能。清除之前操作留下的列表、
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