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1、第三篇_数、符号、公式、图形的第二十章_数的表达数的系统:自然数(NaturalNumbers)、整数(Integers)、有理数(RationalNumbers)、无理数(IrrationalNumbers)、实数(RealNumbers)、度数(PureImaginaryNumbers)、复数(ComplsxNumbers)一、基数35.896.732,546,285读作:thirty-fvetrilioneighthundredandninety-SKbilionsSevenhundredandthirty-twomilionfvehundredandforty-stxthousandt
2、wohundredandeighty-fve|一悟咖-10亿以上的数,英式英语和美式英语表达不同。bilion:1X103(美式);1X102(荣式)trilion:1X102(美式);1X108(英式)quadrilion:X105(美式);1X1024(英式)i1X108(美式);IX105(英式)Sextilion:1X1021(美式);1X1055(英式)Septilion:X1024(美式);1X10口(苹式)octillon:1X1027(美式);X1048(荚式)ncnilion:1X1030(美式);士X1084英式)dediliontX10P(美我);工X105芸式)泓意在上
3、述这样的数词中,hundred,thousand,millionubilion,tnilion等词一般是单数形式。例如:twohundred,threemilion,fivetrilion,etc仁一1标第403号房间Room403读作:roomfourohone的电话号码:0371.7426329TelephoneNumber:0371.7426329读作:zerothreesevenonesevenfourtwoithreetwoine97次列车TrainNumber97读作:trainninety-seven或theninety-seventhtrain。美国西北航空公司3644航班Fl
4、ightNW3644读作:flightNWthreesixfourfour公元刀753年(in)the753BC读作:(in)thayearEvehhundedandfifty-ihrseBC20世纪70年代1970s我19705读作:(in)nineteenseventies1945年8月inAugust1945读作:inAugustnineteenforty-fve伟一人N杨命1997年J月1日“onJuly1(s0,1997或on1Gst)Julyy1997读作:onJulythefirstninety-seven或onthefirstofJulynineteeninety-seven上
5、午九点十分_09:10aum.读作:oh)ninetena.m。二、小数和分数万329.671.239.953579读作:threehundredandtwenty-inemilionsixhundredandSeventy-onethousanidtwohundredandthirty-ninepointninefivethreefivesavannine2.050.0357读作:twothousandandfiftypointzerothreefiveseven01读作:onehundredth(pointzeroone).00001读作:onemillionth(pointzerozer
6、ozerozerooney/pointfourzeroOne)9.621读作:ninepointstwoonea0.555=0.5读作:zeropointthreefivesequalszeropointfverecurringa0诛作:zeropointthree3Evenscurring一0l酐读作:zeropointthreesevenrepetendthree,sevenl。037读作:zeropointsevenrepetentseventwofour,seventhreerepetendseventhree1-工_100.00001=读作:Zeropointf霆uzerosonee
7、qualsoneoveronehundredthousandequalsOneovertentothefifthpowerequalstentotheminusfifthpower-0.0800053=-S53X0.000001=-53X10-4读作:iMinuszeiopcintfvezercsfivethrescauzlsminusfivepointthreetimeszeropointfvezerosOneequalsminusfivepointthreetimestentotheminussixthpower5一58课作:fveandfive-eighths(fveandfiveove
8、reight我fveandfvedividedbyeight)。广訾d3一70428571428571.二-0428571读作:ThreedividedbysevenequalszeropointfourtwoeightfvesevenOnefourtwoeightfvesevenOne,etc,equalszeropointfourtwoeightfvesevenonerepetendfourtwoeightfveSevenone.0.0030=00.003外1000.00003读作:Zeropointzerozerothreepercentequalszeropointzerozeroth
9、reeoveronehundredequalszeropointfourzerosthree不0.23=0.25丶10008o二250ic读作:Zeropointtwofveequalszeropointtwofivetimesthousandpermileequalstwohundredandfiftypermile第二十一章笠号的表达一、一航数学符号2+3读作:twoplusthrees10-0读作:tenminus0白x士3读作:equalsminusorplusfve不读作:xtimesy或xmulipliedby9五4读作:inedividedbyfour1:2奂千乍:therati
10、oofonetotwo园一aa读作:aisto03夜读作:zeropointthreepercent日38e读作:threepointeightpermile界伍爷s丢一巍66X3)十3号课作:OpenparenthesisSixplusfiveandthree-fourthsminusfourpointsiksmuliipliedhythreecloseparenthesisdividedbythreeanconleseyenfh一a厉(a+0(a-刑)课作:asquaredminus5squaredequalsthequantityaplus5timesthequantityaminus.
11、我aSquaredminus5Squaredequalsopenparenthesisapluscloseparenthesistimesopenparenthesis4minuscloseparenthesis.国(a+5a+_】+喂_2濂】+矗课作:Thequantityaplus5tothenthpowerequalsatothethpowerplusntimesthequantityatothenminusOnepowertimes5plusntimesthequantitynminusonedividedbytwotimesthequantityatothenminustwopowertimes5Squareddowntoplus5tothenthpower:不(鲁读作:equalseighty-onetimestwo-thirdstotheeightpower4国2Cr+DR读作:xtothethirdpowerplusoneover/dividedbythequantityxSquaredtimesonetothetwothirdspower.
