📚 Year 9 Edexcel Maths: Key Vocabulary Quick Memorisation Guide | Year 9 Edexcel 数学：词汇术语速记指南
Mastering the language of mathematics is crucial for success in Year 9 Edexcel Maths. This guide provides a collection of essential terms, each paired with a simple definition and a memorisation tip. Use these to boost your confidence in classwork, homework, and assessments.
掌握数学的语言对于 Year 9 Edexcel 数学的成功至关重要。本指南汇集了基本术语，每个都配有简单的定义和记忆技巧。用它们来提升你在课堂作业、家庭作业和评估中的信心。
1. Number Types and Properties | 数的类型与性质
Building a strong understanding of number types will help you unlock factorisation, multiples and roots. Below are the must-learn terms for Year 9.
牢固掌握数的类型有助于理解因数分解、倍数和根式。以下是 Year 9 必须掌握的术语。
-
Integer: Any positive or negative whole number, including zero. Integers have no fractional or decimal part. E.g. -4, 0, 13.
整数：任何正或负的自然数，包括零。整数没有分数或小数部分。例如 -4, 0, 13。
-
Prime Number: A number greater than 1 that has exactly two distinct positive factors: 1 and itself. Think of 'prime' as 'primary' — it cannot be split further. E.g. 2, 3, 5, 7.
质数：大于 1 且只有两个不同正因数的数，即 1 和它本身。把“质”想象成“本质”——不能再分。例如 2, 3, 5, 7。
-
Composite Number: A positive integer greater than 1 that has more than two factors. It can be divided evenly by numbers other than 1 and itself. E.g. 6 (factors 1, 2, 3, 6).
合数：大于 1 且有多于两个因数的正整数。它能被 1 和自身以外的数整除。例如 6（因数 1, 2, 3, 6）。
-
Factor: A whole number that divides exactly into another number, leaving no remainder. E.g. factors of 12 are 1, 2, 3, 4, 6, 12.
因数：能整除另一个数而没有余数的整数。例如 12 的因数是 1, 2, 3, 4, 6, 12。
-
Multiple: The product of a number and any integer. Think of multiples as 'counting in steps' of that number. E.g. multiples of 4: 4, 8, 12, 16 …
倍数：一个数与任何一个整数的乘积。把倍数想象成“按该数步进”。例如 4 的倍数：4, 8, 12, 16 …
-
Highest Common Factor (HCF): The largest factor that two or more numbers share. A quick way is to list all factors and pick the biggest common one. E.g. HCF of 18 and 24 is 6.
最大公因数（HCF）：两个或多个数共有的最大因数。快速方法是列出所有因数，选出最大的共同者。例如 18 与 24 的 HCF 是 6。
-
Lowest Common Multiple (LCM): The smallest multiple that two or more numbers share. Use it when finding common denominators. E.g. LCM of 4 and 5 is 20.
最小公倍数（LCM）：两个或多个数共有的最小倍数。求公分母时用它。例如 4 和 5 的 LCM 是 20。
-
Square Number: plied by itself. E.g. 5² = 25, so 25 is a square number. The notation ² is a shorthand for 'squared'.
平方数：整数自乘的结果。例如 5² = 25，所以 25 是平方数。² 符号是“平方”的速记。
-
Cube Number: i.e. raised to the power 3). E.g. 3³ = 27, so 27 is a cube number. The little ³ stands for 'cubed'.
立方数：一个数自乘两次（即 3 次方）的结果。例如 3³ = 27，所以 27 是立方数。小 ³ 代表“立方”。
-
Square Root (√): multiplied by itself, gives the original number. The symbol √ is called the radical. E.g. √25 = 5 because 5² = 25.
平方根（√）：一个值自乘后得到原数。符号 √ 叫根号。例如 √25 = 5，因为 5² = 25。
2. Fractions, Decimals and Percentages | 分数、小数与百分比
Being comfortable with fractions, decimals and percentages is essential for proportional reasoning and problem solving. Memorise these key terms to avoid common mistakes.
熟悉分数、小数和百分比对于比例推理和问题解决至关重要。记住这些关键术语可避免常见错误。
-
Fraction: A way of representing a part of a whole, written as a numerator over a denominator, e.g. 3/4.
分数：表示整体一部分的方式，写作分子除以分母，如 3/4。
-
Numerator: The top number in a fraction; it shows how many equal parts are being considered. Mnemonic: 'Numerator – Number of parts'.
分子：分数中上方的数，表示考虑了多少个等份。记忆口诀：“分子 – 份子（部分的数量）”。
-
Denominator: The bottom number in a fraction; it tells you the total number of equal parts the whole is divided into. 'Denominator – Denomination' like naming the type of parts.
分母：分数中下方的数，表示整体被分成了多少等份。“分母 – 分类”，指出部分的种类。
-
Equivalent Fractions: You get them by multiplying or dividing the numerator and denominator by the same non-zero number.
等值分数：看似不同但值相等的分数，如 1/2 = 2/4 = 3/6。将分子和分母同时乘或除以同一个非零数即可得到。
-
Simplify a Fraction: Reducing a fraction to its simplest form by dividing the numerator and denominator by their highest common factor, until they share no common factor other than 1. E.g. 8/12 simplifies to 2/3.
约分：通过将分子分母同除以它们的最大公因数，使其变为最简形式，直到除 1 外再无公因数。例如 8/12 约分为 2/3。
-
Decimal: A number written using a decimal point to separate the whole part from the fractional part, based on powers of ten. E.g. 0.75 means 75 hundredths.
小数：使用小数点隔开整数部分和小数部分的数，以十分位、百分位等表示。例如 0.75 意为百分之 75。
-
Percentage: A number expressed as a fraction of 100, denoted by the symbol %. E.g. 45% means 45 out of 100, equal to 0.45 or 9/20.
百分比：以 100 为分母的分数表示法，用 % 表示。如 45% 意为 100 份中的 45 份，等于 0.45 或 9/20。
-
Convert between FDP: ction → decimal (divide numerator by denominator), decimal → percentage (multiply by 100).
FDP
Published by TutorHao | Year 9 Mathematics Revision Series | aleveler.com
广告 / Sponsored培生爱德思考试教材 统计数学3 Edexcel International A Level Mathematics S…数学 备考教辅 · 正版现货 · 与本文内容相关查看详情 / View on Taobao参考价 ¥156.0更多咨询请联系16621398022（同微信）
备考资讯每日更新，关注不错过考纲变化 · 科目分析 · 学习方法
在微信里长按二维码识别关注
或截图后用「扫一扫 → 相册」选择本图公众号：tutorhao