Mastering Fractions, Decimals and Percentages for Cambridge KS3 Maths | 掌握剑桥KS3数学中的分数、小数与百分数

📚 Mastering Fractions, Decimals and Percentages for Cambridge KS3 Maths | 掌握剑桥KS3数学中的分数、小数与百分数

In the Cambridge KS3 Mathematics curriculum, fractions, decimals and percentages are not isolated topics. They form a connected number system that appears in almost every problem-solving context, from sharing quantities to calculating discounts. This article brings together the key skills you need to move fluently between these three representations and apply them with confidence. We will look at equivalent fractions, conversions, ordering, arithmetic, percentage change and common exam-style questions.

在剑桥KS3数学课程中，分数、小数和百分数并不是孤立的主题。它们构成了一个相互关联的数字体系，几乎出现在每一个问题解决情境中——从分配数量到计算折扣。本文将汇总你需要掌握的关键技能，帮助你在三种表示形式之间自如转换并自信地应用。我们将学习等值分数、相互转换、大小比较、四则运算、百分数增减以及常见考试题型。

1. Understanding Equivalent Fractions | 理解等值分数

Equivalent fractions have the same value even though they look different. You can create an equivalent fraction by multiplying or dividing both the numerator and the denominator by the same non-zero whole number. For example, 1/2, 2/4, 3/6 and 12/24 are all equal because each one represents the same shaded part of a whole.

等值分数虽然看起来不同，但数值相同。你可以将分子和分母同时乘以或除以同一个非零整数，从而得到等

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