Math Words That Start With F for Kids: List, Definitions

Math words that start with F like factor and fraction are more than just vocabulary; they’re the building blocks of problem solving and communication. Whether you’re a parent, teacher, or student, learning these terms in English and Chinese makes math lessons richer and more memorable.

What Are Math Words That Start With F?

Math words starting with F include some of the most frequently used terms in elementary and middle school math.

For example:

• Factor (因素 yīn sù): Numbers you multiply to make another number.

• Fraction (分数 fēn shù): A way to show parts of a whole.

Knowing these words helps students follow instructions, understand textbooks, and communicate math ideas confidently.

Top Math Words That Start With F List

Below is a categorized table of 20 common math words beginning with F.

Each entry includes the English word, definition, Chinese translation, pinyin, and a sample sentence.

Top Math Words That Start With F

Factor – 因素 yīn sù

Definition: A number that divides another number exactly or a number multiplied to produce another number.
Example: “2 and 3 are factors of 6.” / “2 和 3 是 6 的因素。”

Fraction – 分数 fēn shù

Definition: A number that represents a part of a whole, expressed as one number over another.
Example: “1/2 is a fraction.” / “1/2 是一个分数。”

Formula – 公式 gōng shì

Definition: A mathematical rule or relationship expressed in symbols.
Example: “The area of a rectangle is given by the formula A = l × w.” / “矩形面积的计算公式是 A = l × w。”

Function – 函数 hán shù

Definition: A relation between a set of inputs and a set of possible outputs.
Example: “f(x) = x + 2 is a function.” / “f(x) = x + 2 是一个函数。”

Fibonacci Sequence – 斐波那契数列 fěi bō nà qì shù liè

Definition: A series of numbers where each number is the sum of the two preceding ones.
Example: “The Fibonacci sequence starts 0, 1, 1, 2, 3, 5…” / “斐波那契数列开始为 0, 1, 1, 2, 3, 5…”

Face (of a solid) – 面 miàn

Definition: A flat surface that forms part of the boundary of a solid object.
Example: “A cube has 6 faces.” / “立方体有 6 个面。”

Frequency – 频率 pín lǜ

Definition: The number of times an event occurs in a fixed period.
Example: “The frequency of rolling a 6 on a die is 1/6.” / “掷骰子得到 6 的频率是 1/6。”

Forecasting – 预测 yù cè

Definition: Using data and trends to predict future outcomes.
Example: “We use math for forecasting sales.” / “我们用数学进行销售预测。”

Frustum – 台体 tái tǐ

Definition: A portion of a solid (normally a cone or pyramid) that lies between two parallel planes cutting it.
Example: “A frustum of a cone.” / “圆锥的台体。”

Frequency Table – 频率表 pín lǜ biǎo

Definition: A table that shows the number of times each result occurs.
Example: “We created a frequency table of survey answers.” / “我们制作了一个调查答案的频率表。”

Force – 力 lì

Definition: Strength or energy applied to an object to move it.
Example: “The force pushes the box forward.” / “这个力把箱子推向前。”

Fluctuation – 波动 bō dòng

Definition: A variation or change in quantity over time.
Example: “Stock prices show daily fluctuations.” / “股票价格每天都有波动。”

Flow Rate – 流量 liú liàng

Definition: The amount of fluid passing a point in a given time.
Example: “Calculate the water flow rate in liters per second.” / “计算每秒的水流量（升/秒）。”

Finite – 有限 yǒu xiàn

Definition: Having a limited number or amount.
Example: “This set contains a finite number of elements.” / “这个集合包含有限个元素。”

Factorial – 阶乘 jiē chéng

Definition: The product of all positive integers up to a given number.
Example: “4! = 24 is a factorial.” / “4! = 24 是阶乘。”

Field – 域 yù

Definition: A set with two operations (addition and multiplication) that satisfy certain rules.
Example: “Real numbers form a field in mathematics.” / “实数在数学中构成一个域。”

Feasible Region – 可行域 kě xíng yù

Definition: The set of all possible points that satisfy given constraints in linear programming.
Example: “Shade the feasible region on the graph.” / “在图上标出可行域。”

Fixed Point – 不动点 bù dòng diǎn

Definition: A point that remains unchanged under a given function or operation.
Example: “x = 1 is a fixed point of f(x) = x² – x + 1.” / “x = 1 是函数 f(x) = x² – x + 1 的不动点。”

Focus – 焦点 jiāo diǎn

Definition: A special point related to curves, like parabolas or ellipses.
Example: “Mark the focus of the parabola.” / “标出抛物线的焦点。”

Frame – 框架 / 坐标框架 kuàng jià / zuò biāo kuàng jià

Definition: A structure or boundary used in geometry to define position.
Example: “Draw the frame for the shape on the grid.” / “在网格上绘制图形的框架。”

Math Words That Start With F: Usage and Examples

These F math terms appear across topics:

• In arithmetic, children find factors and simplify fractions.

• In geometry, they count faces and identify figures.

• In algebra, they evaluate a function or apply a formula.

Using bilingual flashcards or real-life examples, teachers can help students internalize meaning. For example, cooking offers a way to teach fractions (分数) with measuring cups.

Conclusion

Mastering math words that start with F helps kids (and adults) build a stronger math vocabulary, communicate ideas, and connect English with Chinese learning. From factor 因素 to Fibonacci 斐波那契, these terms make math engaging.

WuKong Education offers personalized online math courses where certified teachers blend key math vocabulary with learning.

Nathan | WuKong Math Teacher

Graduated from the University of New South Wales. He has over 8 years of experience teaching elementary and high school mathematics and science. As a rigorous and steady mathematics teacher, Nathan has always been well received by students 1-12 grades.