数字的英文读法

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1、FundamentalsandNewConceptsforElectronics＆Telecommunications数字及数学表达式的英文读法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。3.40.830.34Birthratewasup2.5timesinthoseyears.Ourgrainoutputwillbe3.7timesthatof1960.比率、百分数比率的表示通常都用数字,有时亦可用文字。Theratiosof1to3and5to15arethesame.Youhavea

2、fiftytofiftychancetowinthegame.百分数用percent或percent表示,即"%"Thepricehasbeenreducedby20percent(or20%)sinceMay.Thenumberofvisitingpatientsis30percent(or30%)lessthanthesametimelastyear.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)。

3、时刻的表示7:009:1511:265:3008:0012:0014:1524:00单位的表达2×3feet2×3×6inchesThisparcelweighes3pounds5ouncesIboughta4feetby5feetrug.Thetemperaturedroppedto-22℃.Hisheightis178cm.(orHeis178cmtall.)Thesizeoftheboxissixfeetbyfourbythreeandtwo-thirds.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

4、词>可读作double。Myofficephonenumberis268-8064extension321.Myaccountnumberis38800685.货币$18.29$15C$268JP￥10,000WilliamⅠElizabethⅡ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＝20Fourtimesfiveistwe

5、nty.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)roo

6、tofsixteenisfour.Thecube(orthird)rootoftwenty-sevenisthree.Logic∃thereexist ∀ forallp⇒qpimpliesq/ifp,thenqp⇔qpifandonlyifq/pisequivalenttoq/pandqareequivalent数学表达式的读法Setsx∈AxbelongstoAx∉AxdoesnotbelongtoAA⊂B AiscontainedinB/AisasubsetofBA⊃B AcontainsB/BisasubsetofAA∩B AcapB/AmeetB/Ainte

7、rsectionBA∪B AcupB/AjoinB/AunionBAB AminusB/thediferencebetweenAandBA×B AcrossB/thecartesianproductofAandB数学表达式的读法Linearalgebra‖x‖ thenorm(ormodulus)ofxOA→ OA/vectorOAOA¯ OA/thelengthofthesegmentOAATAtranspose/thetransposeofAA−1 Ainverse/theinverseofA数学表达式的读法