你能用英语把这个等式（equation）读出来吗？
被难倒了吧！
别着急！看完下面英语夏令营给你整理的各种数学符号和标点符号的英文表达，你马上就会说了！
数学符号
Mathematical symbols
01
+: plus 加号；正号
“1+1”读作：one plus one
02
-: minus; negative 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 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.
07
≠： is not equal to 不等于号
“a≠b”读作：a is not equal to b
08
≌： congruent 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<2”读作 One is less than two.
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.
15
≥： 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
%: percent 百分之……
“10%”读作：ten percent
17
‰ : per mill ; per thousand 千分之……
“10‰”读作：ten per thousand
18
∞： infinity 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.
22
∵： since; because 因为
“∵1+1=2”读作：because one plus one equals two
23
∴： hence; therefore 所以
“∴1<2”读作：hence one is less than two
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 半圆
“⌒AB”读作：semicircle AB
26
⊙： circle 圆
“⊙A”读作：circle A
27
○： circumference 圆周
“○=π×d”读作：Pi multiplied by d equals circumference.
28
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 垂直于
“A⊥B”读作：A is perpendicular to B.
31
//: parallel 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 of 交，通集
“A∩B”读作：The intersection of A and B
34
∫： the integral of ……的积分
“∫x”读作：the integral of x
35
∑： summation of 总和
“∑x”读作：the summation of x
36
equation 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）。