【数学符号的英语读法】+ plus加号，正号；- minus减号，负号；× is multiplied by乘号；÷ is divided by除号；= is equal to等于号；≠ is not equal to不等于号；< is less than小于号；> is greater than大于号；≤ is less than or equal to小于等于号；≥ is more than or equal to大于等于号；≈ approximately equal/is approximately equal to 约等；% percent 百分之…；‰ per mill 千分之…；∞ infinity 无限大号；π pi 圆周率；△ triangle 三角形；⊥ perpendicular to垂直于；∥ be parallel to 平行于；∵ because/since 因为；∴ therefore/so/hence 所以