1. 小数点后，公车、房间、电话等号码，年份中读作oh，如：9.02读作Nine point oh two，101房间读作Room one oh one，1906读作Nineteen oh six；2. 小数点前读nought，如0.
+ plus 加号；正号- minus 减号；负号± plus or minus 正负号× 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 equivalent
