数学符号的基本读法:
+ 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="">
> 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