+　 plus
加號(hào)；正號(hào)

-　 minus
減號(hào)；負(fù)號(hào)

±　plus or minus
正負(fù)號(hào)

×　is multiplied by
乘號(hào)

÷　is divided by
除號(hào)

＝　is equal to
等于號(hào)

≠　is not equal to
不等于號(hào)

≡　is equivalent to
全等于號(hào)

≌　is equal to or approximately equal to
等于或約等于號(hào)

≈　is approximately equal to
約等于號(hào)

＜　is less than
小于號(hào)

＞　is greater than
大于號(hào)

≮　is not less than
不小于號(hào)

≯　is not more than
不大于號(hào)

≤　is less than or equal to
小于或等于號(hào)

≥　is more than or equal to
大于或等于號(hào)

%　 per cent
百分之…

‰　per mill
千分之…

∞　infinity
無(wú)限大號(hào)

∝　varies as
與…成比例

√　(square) root
平方根

∵　since; because
因?yàn)?/div>
∴　hence
所以

∷　equals, as (proportion)

等于，成比例

∠　angle
?
角

⌒　semicircle
?
半圓

⊙　circle
?
圓

○　circumference
?
圓周

π　pi
圓周率

△　triangle
?
三角形

⊥　perpendicular to
?
垂直于

∪　union of
并，合集

∩　intersection of
交，通集

∫　the integral of
…的積分

∑　(sigma) summation of
總和

°　degree
度

′　minute
分

″　second
秒

℃　Celsius system
攝氏度