数字的英文读法

FundamentalsandNewConceptsforElectronics＆Telecommunications数字及数学表达式的英文读法

Somequestions?1.Howmanystudentsarethereinourclass?672.Howmanystudentsarethereinsichuan?5500,0003.what’sthepopulationofChina?1,300,000,0004.Howmanypeoplearethereintheworld?6,000,000,000HundredThousandMillionbillion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、百分数百分数用percent或percent表示,即"%"Thepricehasbeenreducedby20percent(or20%)sinceMay.Thenumberofvisitingpatientsis30percent(or30%)lessthanthesametimelastyear.Someexercise343,002,112;

0.67;

56%;

1/2;

45,332;

2.74;9,003,000;35%;4/7;12,000,000,00045%;7.894;

1/4;890,000;345,000,34187,887;2/3;6.73;666,700,000;78%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)。

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＝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

∀

forall

p⇒q

pimpliesq/ifp,thenq

p⇔q

pifandonlyifq/pisequivalenttoq/pandqareequivalent

数学表达式的读法Sets

x∈A

xbelongstoAx∉A

xdoesnotbelongtoAA⊂B

AiscontainedinB/AisasubsetofB

A⊃B

AcontainsB/BisasubsetofA

A∩B

AcapB/AmeetB/AintersectionB

A∪B

AcupB/AjoinB/AunionB

A\B

AminusB/thediferencebetweenAandB

A×B

AcrossB/thecartesianproductofAandB数学表达式的读法Linearalgebra

‖x‖

thenorm(ormodulus)ofx

OA→

OA/vec