数字的英文读法 (1)

数字及数学表达式的英文读法1.基数词英文是以每三位划分一个单位:thousand,million,billion,trillion。如:134,256,366,906读作:onehundred(and)thirty-fourbillion,twohundred(and)fifty-sixmillion,threehundred(and)sixty-sixthousand,ninehundred(and)six.(在美式英语中,往往省略hundred后面的and)。一些特殊读法,特别是在财经新闻中常常遇到违反常规的读法。如以下实例:例1:InNewYork,theDowShareIndexclosed45higherat6,783.(读作:sixty-seveneighty-three)例2:TheDowJonesIndustrialAverageclosedup96pointsat10,116.TheStandardandPoor’s500Indexgained6pointstocloseat1,254.(10,116读作:tenthousandonehundredsixteen;1,254读作:twelvehundredandfifty-four)2.序数词序数词中除first,second,third,其余都是在基数词末尾加上-th构成,只有部分在拼写方法上略有变动。LessonNine=theninthlesson第九课;WorldWarⅡ(WorldWarTwo)=thesecondworldwar第二次世界大战等。但要注意在提及国王或女王时,只能用序数词,而不能用基数词。如:QueenElithabethII应读作:QueenElithabeththesecond,而不能读作QueenElithabethtwo。3.号码电话号码,房间号,帐号,汽车牌号等按编号的顺序一个一个地读出,遇到“0”时读oh,相连的两个相同的基数词可读作double。Myofficephonenumberis268-8064extension321.Myaccountnumberis38800685.电话号码读电话号码首先要按照国家代码、区号、号码本身来分开,如86-0551-3837898,然后逐个数字读出。3+4:3837898读作threeeightthree,seveneightnigheight;4+428465258读作twoeightfoursix,fivetwofiveeight。如果遇到两个或三个相连数字相同,可分别用double和treble。但开头三个数字相同,通常仍应该分开读,如:5553298应读作fivefivefive,threetwonineeight,而不是treblefive,threetwonineeight。而且运用double或treble时,仍应遵循上述数字分组规则,如:7733298应读作doubleseventhree,threetwonineeight,而不是doublesevendoublethreetwonineeight。门牌号通常情况下,三位门牌号逐个读出,四位门牌号每两个数分一组。如:Classroom305读作:Classroomthree-oh/zero-five;Room2534读作:Roomtwenty-fivethirty-four。“0”的读法0可以读作zero,nought,null,nil,nothing,oh。nil多见于体育赛事,如:3:0读作threenil或threetonothing。4.分数分数的分子用基数词表示,分母用序数词表示。若分子大于1,分母用复数。如:1/3,读作:onethird;2/7读作:twosevenths。如果分子或分母数值较大,或在数学计算中,常常会用over来读分数线,如:32/46读作thirty-twooverforty-six。但要注意1/2,1/4和3/4分别读作:a(one)half,a(one)quarter,threequarters。5.小数小数是用数字来表示的,小数点后无论有多少位数也不要在中间插入逗点;小数点读作point;小数点后面的数字要一个一个地读出。9.45读作：“ninepointfourfive”,（但有时也会听到“ninepointforty-five”的特例读法。）如果小数点前为0,读作nought或zero。.6.比率、百分数比率的表示通常都用数字,有时亦可用文字。Theratiosof1to3and5to15arethesame.Youhaveafiftytofiftychancetowinthegame.百分数用percent或percent表示,即%Thepricehasbeenreducedby20percent(or20%)sinceMay.Thenumberofvisitingpatientsis30percent(or30%)lessthanthesametimelastyear.7.日期,年份的表示在年的表示中,如果数字较小,或者新世纪初的几个年份,可以直接当作基数词读出,如:357A.D.读作“threehundredfifty-sevenA.D.”;2006读作“twothousand(and)six”。数值较大时,习惯于两位一组读出,如:1980读作“nineteeneighty”。7.日期,年份的表示May22,也写作May22nd;July15，也写作July15th;August1，也写作August1st;1949;1804;1700;2000;685B.C.;1960's(or1960s)。8.时刻的表示如果想表示刚好在某一个整点,如11:00,可以用“at11o’clocksharp/onthehour/onthestrike”。而12:00也可读为“atnoon”;00:00为“atmidnight”。14:00：fourteenhundred9:1511:265:3012:0014:1524:00单位的表达2×3feet2×3×6inchesThisparcelweighs3pounds5ouncesIboughta4feetby5feetrug.Thetemperaturedroppedto-22℃.Hisheightis178cm.(orHeis178cmtall.)Thesizeoftheboxissixfeetbyfourbythreeandtwo-thirds.货币$18.29$15C$268JP￥10,000WilliamⅠElizabethⅡ帝王第～世数学表达式的读法＋“读作plus或and;—“读作minus或from;ד读作times或multipliedby;÷“读作dividedby等。5＋8＝13Fivepluseightisthirteen.15-6＝9Fifteenminussixisnine.4×5＝20Fourtimesfiveistwenty.Fourmultipliedbyfiveistwenty.8÷2＝4Eightdividedbytwoisfour.数学表达式的读法A＞BAisgreaterthanB.A≥BAisgreaterthanorequaltoB.A＜BAislessthanB.A≤BAislessthanorequaltoB.A≠BAisnotequaltoB.Fivesquaredistwenty-five.Fivecubedisonehundredandtwenty-five.Twotothefourthpowerissixteen.Thesquare(orsecond)rootofsixteenisfour.Thecube(orthird)rootoftwenty-sevenisthree.Logic∃thereexist∀forallp⇒qpimpliesq/ifp,thenqp⇔qpifandonlyifq/pisequivalenttoq/pandqareequivalent数学表达式的读法Setsx∈AxbelongstoAx∉AxdoesnotbelongtoAA⊂BAiscontainedinB/AisasubsetofBA⊃BAcontainsB/BisasubsetofAA∩BAcapB/AmeetB/AintersectionBA∪BAcupB/AjoinB/AunionBA\BAminusB/thediferencebetweenAandBA×BAcrossB/thecartesianproductofAandB数学表达式的读法Linearalgebra‖x‖thenorm(ormodulus)ofxOA→OA/vectorOAOA¯OA/thelengthofthesegmentOAATAtranspose/thetransposeofAA−1Ainverse/theinverseofA数学表达式的读法