1.加法，addition
加号，plus sign
1 + 1 = 2  (verbally, "one plus one is equal to two")
交换律，commutativity
结合律，associativity

2. 减法，substraction
减号，minus sign
c-b=a，minuend (c) − subtrahend (b) = difference (a)
c minus b leaves a.

3.乘法，multiplication
乘号，multiplication sign
2x3=6 (verbally, "two times three equals six")

4.除法，division
a÷b=c，a divided by b equals c
a is called the dividend, b the divisor and c the quotient.
a/b，"a divided by b", "a by b" or "a over b"

5.指数

X^4: fourth power of X


Y^1/5: Quintic root of Y



X的绝对值: Absolute (value) of X



根号下X的平方加Y的平方: Square root of the sum of x square and y square.



(2x+1)(4x-3): two x plus one muliplied by four X minus 3



log以3为底的2: logarithm three to the base two

符号
* round brackets, open brackets, brackets (UK), or parentheses: ( )
* square brackets, closed brackets, or brackets (US): [ ]
* curly brackets, squiggly brackets, definite brackets, swirly brackets, birdie brackets, Scottish brackets, squirrelly brackets, or braces: { }
* angle brackets, triangular brackets, inequality signs, or chevrons: < >
* tuples: 〈 〉 * corner brackets: ⸤,⸥; ｢,｣ Punctuation

apostrophe ( ’ ' )
bracket
colon ( : )
comma ( , )
dashes ( ‒, –, —, ― )
 ellipsis ( …, ... )
exclamation mark ( ! )
 full stop/period ( . )
guillemets ( « » )
hyphen ( -, ‐ )
question mark ( ? )
quotation marks ( ‘ ’, “ ” )
semicolon ( ; )
slash/stroke ( / )
solidus ( ⁄ )
Word dividers spaces ( ) ( ) ( ) ( ) (␠) (␢) (␣) interpunct ( · ) General typography ampersand ( & ) at sign ( @ ) asterisk ( * ) backslash ( \ ) bullet ( • ) caret ( ^ ) copyright symbol ( © ) currency generic: ( ¤ ) specific: ( ₳, ฿, ₵, ¢, ₡, ₢, ₠, $, ₫, ₯, €, ƒ, ₣, ₲, ₴, ₭, ℳ, ₥, ₦, ₧, ₱, ₰, £, ₪, ₸, ₮, ₩, ¥ ) daggers ( †, ‡ ) degree ( ° ) ditto mark ( 〃 ) inverted exclamation mark ( ¡ ) inverted question mark ( ¿ )
number sign/pound/hash ( # )
numero sign ( № ) ordinal indicator (º, ª) percent (etc.) ( %, ‰, ‱ ) pilcrow ( ¶ )
prime ( ′ )
 registered trademark ( ® ) section sign ( § ) service mark ( ℠ ) sound recording copyright symbol ( ℗ ) tilde ( ~ ) trademark ( ™ ) underscore/understrike ( _ ) vertical/broken bar, pipe ( |, ¦ ) Uncommon typography asterism ( ⁂ ) falsum ( ⊥ ) index/fist ( ☞ )
therefore sign ( ∴ )
because sign ( ∵ )
interrobang ( ‽ ) irony mark/percontation point ( ؟ ) lozenge ( ◊ ) reference mark ( ※ ) tie ( ⁀ )

希腊字母读法

1、 Α α alpha a:lf 阿尔法 角度；系数
2、 Β β beta bet 贝塔 磁通系数；角度；系数
3、 Γ γ gamma ga:m 伽马 电导系数（小写）
4、 Δ δ delta delt 德尔塔 变动；密度；屈光度
5、 Ε ε epsilon ep`silon 伊普西龙 对数之基数
6、 Ζ ζ zeta zat 截塔 系数；方位角；阻抗；相对粘度；原子序数
7、 Η η eta eit 艾塔磁滞系数；效率（小写）
8、 Θ θ thet θit 西塔温度；相位角
9、 Ι ι iot aiot 约塔 微小，一点儿
10 、Κ κ kappa kap 卡帕 介质常数
11 、∧ λ lambda lambd 兰布达 波长（小写）；体积
12 、 Μ μ mu mju 缪 磁导系数；微（千分之一）；放大因数（小写）
13 、Ν ν nu nju 纽 磁阻系数
14 、Ξ ξ xi ksi 克西
15 、Ο ο omicron omik`ron 奥密克戎
16 、∏ π pi pai 派 圆周率=圆周÷直径=3.1416
17 、Ρ ρ rho rou 肉 电阻系数（小写）
18 、∑ σ sigma `sigma 西格马总和（大写），表面密度；跨导
19 、Τ τ tau tau 套 时间常数 τ：套 Tau
20 、Υ υ upsilon jup`silon 宇普西龙 位移υ：宇普西龙 Upsilon
21 、Φ φ phi fai 佛爱 磁通；角 φ：fai Phi
22 、Χ χ chi phai 西 Χ χ：器 Chi
23 、Ψ ψ psi psai 普西 角速；介质电通量（静电力线）；角Ψ   ψ：普赛 Psi
24 、Ω ω omega o`miga 欧米伽 欧姆（大写）；角速（小写）；角 Ω ω：欧米伽 Omega