"加减乘除"及各种符号标点的英文表达
数学符号01
+
plus 加号；正号
“1+1”读作：one plus one
02
－
minus ['maɪnəs]; negative ['negətɪv]
减号；负号
“2-1”读作：two minus one
“-3”读作：minus three或negative three
“2-(-3)”读作：two minus negative three
03
±
plus-minus sign 正负号
“±1” 读作：plus or minus one
04
×
multiplied [’mʌltɪ’plaɪd] by ; times
乘号
“2×3” 读作：two multiplied by three 或 two times three 05
÷
divided by 除号
“4÷2”读作：four divided by two
06
=
equals; is equal to 等于号
“1+1=2”读作：One plus one equals two.
或 One plus one is equal to two.
≠
is not equal to 不等于号
“a≠b”读作：a is not equal to b
08
≌
congruent ['kɒŋgrʊənt] to
全等（两个图形形状相同、大小相等）
“△ABC≌△DEF”读作：Triangle ABC is congruent to Triangle DEF. 09
≈
approximately equal to 约等于号
“3×3≈10” 读作：Three multiplied by three is approximately equal to ten. 10
is less than 小于号
“1
11
>
is greater than 大于号
“2>1”读作：Two is greater than one.
12
≮
is not less than 不小于号
“3≮2”读作：Three is not less than two.
13
≯
is not greater than 不大于号
“2≯4” 读作：Two is not greater than four.
14
≤
is less than or equal to 小于或等于号
“2≤3”读作：Two is less than or equal to three.
≥
is greater than or equal to 大于或等于号
“5≥4”读作：Five is greater than or equal to four.
16
%
per cent 百分之……
“10%”读作：ten percent
17
‰
per mill [mil]; per thousand千分之……
“10‰”读作：ten per thousand
18
∞
infinity [ɪn'fɪnɪtɪ] 无限大号
“－∞” 读作：negative infinity
19
∝
varies as 与...成比例
“X∝Y”读作：X varies as Y
20
√￣
square root 平方根
“√￣16=4”读作：The square root of sixteen is four.
21
3√￣
cube root 立方根
“3√￣27=3”读作：The cube root of 27 is 3.
∵
since; because 因为
“∵1+1=2”读作：because one plus one equals two
23
∴
hence; therefore 所以
“∴1
24
∠
angle 角
“∠A”读作：angle A
“∠A +∠B+∠C=180°”
读作：The measure of angle A plus angle B plus angle C equals
180 degrees.
25
⌒
semicircle ['semɪsɜːkl] 半圆
“⌒AB”读作：semicircle AB
26
⊙
circle 圆
“⊙A”读作：circle A
27
○
circumference [sə'kʌmf(ə)r(ə)ns] 圆周
“○=π×d”读作：Pi multiplied by d equals circumference.
π
pi constant 圆周率
“π×d”读作：pi multiplied by d
29
△
triangle 三角形
“△ABC”读作：triangle ABC
What is the area of triangle ABC? 求三角形ABC的面积。 30
⊥
perpendicular to [,pɜːp(ə)n'dɪkjʊlə] 垂直于
“A⊥B”读作：A is perpendicular to B.
31
//
parallel ['pærəlel] to 平行于
Line AB is parallel to line CD.
32
∪
union of 并，合集
“A∪B”读作：the union of A and B
33
∩
intersection [ɪntə'sekʃ(ə)n] of 交，通集
“A∩B”读作：The intersection of A and B
34
∫
the integral [ˈɪntɪɡrəl] of ……的积分
“∫x”读作：the integral of x
35
∑
summation of 总和
“∑x”读作：the summation of x
equation [ɪ'kweɪʒ(ə)n]
方程式、等式
“y = kx” 读作：
Y varies as x.
K is "the constant of variation.
y与x成正比（y是x的正比函数），k是常数。
“y = k/x”读作：
Y varies inversely as x.
y与x成反比例（y是x的反比例函数）。
标点符号°
degree 度
′
minute 分
″
second 秒
℃
Celsius [ˈselsiəs] degree 摄氏度
ºF
Fahrenheit ['fær(ə)nhaɪt] degree 华氏度
@
at sign
{ }
curly brackets 波形括号
[ ]
square brackets 方括号
（）
parentheses [pəˈrenθəsɪs] ; brackets [ˈbrækɪt]; round brackets 括号
(
open parenthesis 左括号
)
close parenthesis 右括号
.
point/dot 点
|
vertical bar; vertical virgule['vɜ:gju:l] 竖线
&
ampersand[ˈæmpəsænd]; and; reference; ref 和，引用 *
asterisk ['æstərɪsk], multiply, star, pointer 星号，乘号，星，指针
/
slash; divide; oblique; stroke; solidus 斜线，斜杠，除号
//
slash-slash; comment 双斜线，注释符
#
number sign; pound sign; hash 井号
\
backslash 反斜线转义符
~
tilde[ˈtɪldə] 波浪符
.
full stop; period 句号
,
comma 逗号
:
colon 冒号
;
semicolon 分号
?
question mark 问号
!
exclamation[ˌekskləˈmeɪʃn] mark 惊叹号 '
apostrophe[əˈpɒstrəfi] 撇号、所有格符号 -
hyphen ['haɪf(ə)n] 连字号
－
dash 破折号
_
underscore; understrike 下划线 ...
ellipsis [ɪˈlɪpsɪs] 省略号
‘’
single quotation marks 单引号 “”
double quotation marks 双引号 ”
Ditto Sign 如上所述
‖
parallel 双线号
〜
swung dash 代字号
§
section sign; division 分节号
→
arrow 箭号；参见号