+  plus
加號;正號

-  minus
減號;負(fù)號

± plus or minus
正負(fù)號

× is multiplied by
乘號

÷ is divided by
除號

= is equal to
等于號

≠ is not equal to
不等于號

≡ is equivalent to
全等于號

≌ is equal to or approximately equal to
等于或約等于號

≈ is approximately equal to
約等于號

< is less than
小于號

> is greater than
大于號

≮ is not less than
不小于號

≯ is not more than
不大于號

≤ is less than or equal to
小于或等于號

≥ is more than or equal to
大于或等于號

%  per cent
百分之…

‰ per mill
千分之…

∞ infinity
無限大號

∝ varies as
與…成比例

√ (square) root
平方根

∵ since; because
因為

∴ hence
所以

∷ equals, as (proportion)

等于,成比例

∠ angle
?

⌒ semicircle
?
半圓

⊙ circle
?

○ 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

′ minute

″ second

℃ Celsius system
攝氏度