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1、4sModule5ALessoninaLabListening&Speaking&VWriting学习目标1.Learntoreaddifferentnumbers。2.Learntowriteanexperimentreport.3.GettoknoWhowtoexpressSequence.范语中基教词、序数词、分数、小数和百分数,你会读吗?1,000,000,0001工1bulhiontIniliiontthousand5目命命命命命命国命命国国命国国吴国国园国园园颂课堂探究1.基数词的读法A.先说“几十“,再说“几“,中间用连字符。例如23一twenty-three89一eighty-
2、nineB.先说“几百“,再加and,再加末两位数(或未位数)。例如:223一twohundredandtwenty-three416一fourhundredandsixteen809一eighthundredandnineC.1000以上的数先从后向前数,每三位数加一“,(千分位;从后向前,第一个“,“号前为thousand;第二个“,“号前为million;第三个“,“号前为billion。例如:1001一onethousandandone4,000一fourthousanti9,743一ninethousand,sevenhundredandforty-three174,301一a(on
3、e)hundredandseventy-fourthousand,hundredandone750,000,000一sevenhundredandfiftymillion2.序数词的读法序数词一般以与之相应的基数词加词尾-th构成,例如:tenth(第十,但下面这些基数词在变序数词时,有特别的地方。例如:00e一rstti70一-Secontthree一thirdfive_fiftheight一eighthnine一ninthtwelve一twelfth3.分数表达法D先说分子,后说分母;2)分子用基数词,分母用序数词;3)分子大于L分母加-sU4aqnarter=0nequarterU3“athird=onethird4/5four-fifths3/4threequarters=threefourthsU2ahalf=onehalf4.小数的读法23.45twenty-threepointfourfive100.32“onehundredpointthreetwo87.675elghty-sevepointsixseventfive7.564Sevenpointfivesixfour
