+ plus 加號;正號

- minus 減號;負號

± plus or minus 正負號

× 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

< less than sign 小于號

> more than or greater than sign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 角

⌒ semicircle 半圓

⊙ circle 圓

○ circumference 圓周

△ 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

# number …號

℃ Celsius system 攝氏度

@ at 在