KS3 Maths: Calculation Practice Drill | KS3 数学：计算题专项训练

📚 KS3 Maths: Calculation Practice Drill | KS3 数学：计算题专项训练

Welcome to the ultimate KS3 calculation practice drill, designed to build your confidence and fluency with numbers. In this article, we cover essential arithmetic skills including order of operations, integers, fractions, decimals, percentages, and ratio. By working through targeted examples and honing your mental maths techniques, you will be fully prepared for tests and real-world problem-solving. Let’s get started with the fundamentals!

欢迎来到 KS3 计算题专项训练，本文旨在帮你建立对数字的信心与熟练度。我们将涵盖运算顺序、整数、分数、小数、百分数和比例等基本算术技能。通过针对性例题和心算技巧的磨练，你将从容应对考试和实际生活中的数学问题。让我们从基础开始吧！

1. Order of Operations (BIDMAS) | 运算顺序 (BIDMAS)

BIDMAS tells us the correct sequence when multiple operations appear together: Brackets, Indices, Division and Multiplication (from left to right), Addition and Subtraction (from left to right). Applying this rule avoids common calculation errors.

BIDMAS 告诉我们多项运算同时出现时的正确顺序：括号、指数、除法和乘法（从左到右）、加法和减法（从左到右）。应用这一规则可以避免常见的计算错误。

8 + 2 × 3 = 8 + 6 = 14

Always multiply before adding. If we mistakenly added first, we would obtain (8 + 2) × 3 = 30, which is incorrect.

务必先乘除后加减。如果错误地先做加法，会得到 (8 + 2) × 3 = 30，这是不对的。

(3 + 4) × (5 − 2)² = 7 × 3² = 7 × 9 = 63

Work from the innermost bracket outward. Here we calculated inside brackets first, then the index, and finally multiplied.

由最内层括号向外计算。依次先

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