文档介绍:英语的加减乘除加plus,add加plus(介词,作形容词时,是正的,等同于positive)add(动词)4plus3equals7.Ifyouadd4to3youget7.HermarkwasBplus。她的分数B+。减minus,subtract减minus(介词,作形容词讲时,是“负的”的意思,相当negative)subtract(动词,常与from连用)减去;扣除12minus7leaves5.十二减去七剩五。Ifyousubtract3from5,youget2.Thetemperaturewasminus20degrees.温度是零下20度。乘multiply乘multiply(动词)3multipliedby5is15.三乘五等于十五。除divide除divide(动词)除15等于5。Threewillnotdivideintoeleven.三除不尽十一。+3=5Twoplusthreeis(equals,isequalto)five.5-3=2Fiveminusthreeisequaltotwo.3×2=.9÷3=?(1)年号的读法:1979←→eenseventy-eenhundred(and)seventy-nine; (2)电话号码、货币的读法:1023←→oneotwothree;1227←→onedoubletwo(ortwotwo)seven;.25←→fourdollars(and)twenty-five(cents);(3)小数点的读法:←→thirteendecimal(point)nineone;=noughtdemicaltwothree;Numberscardinalnumbers(基数词)ordinalnumbers(序数词)基数词(cardinalnumbers)的构成及用法:~12的基数词是独立单词,无规律可循。~19的基数词一般在3~9对应的基数词后加-teen构成,注意:~90八个整十位数以后缀-ty结尾。注意:twenty(20)thirty(30)forty(40)eighty(80)4.“几十几“的基数词由十位数和个位数中间加连字符“-”构成:twenty-y-seven