(Punctuation/math/...) English/English Expressions of symbols

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The expression of symbols in English

+ plus  加；正- minus  减；负± plus-minus  正负* is multiplied by / multipication sign  乘÷ is divided by / division sign  除= is equal to  等于≠ is not equal to  不等于≡ or === is equivalent to  全等于/恒等于? is approximately equal to or equal to / almost equal or equal to  等于或约等于≈ is approximately equal to / almost equal to  约等于< is less than  小于> is greater than  大于≮ is not less than  不小于≯ is not greater than  不大于≤ is less than or equal to  小于或等于≥ is greater than or equal to  大于或等于% percent / per cent  百分之…‰ per mille  千分之…? per ten thousand  万分之…∞ infinity  ∝ varies as / proportional to 与...成比例√ square root  平凡根? cube root∴ hence / therefor  所以 ∵ since / because  因为∶ ratio  比率；比例∷ equals / proportion  成比例∠ angle  角⌒ semicircle  半圆⊙ circle 圆○ circumference  圆周△ triangle 三角形⊥ perpendicular to 垂直于∪ union of 并，合集∩ intersection of 交，通集∫ the integral of …的积分∑ (sigma) summation of 总和° degree 度′ minute 分″ second 秒＃ number …号℃ Celsius system 摄氏度＠ at 在

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51Talk worry-free English/mac simplified Pinyin Input method

(Punctuation/math/...) English/English Expressions of symbols