英语中基数词、序数词、分数、小数和百分数的读法.ppt
语法英语中基数词、序数词、分数、小数和百分数的写法,读法,1.基数词的读法：,A.23 89,B.223 416 809,twenty-three,eighty-nine,two hundred and twenty-three,four hundred and sixteen,eight hundred and nine,How to say?百千 万十万百万千万亿十亿,hundred,thousand,ten thousand,one hundred thousand,million,ten million,one thousand million,billion,C.1000以上的数从后向前数，每三位数加一“,”（千分位）；第一个“,”号前为thousand;第二个“,”号前为million;第三个“,”号前为billion。如：1,001 4,000 9,743 174,301750,000,000,one thousand and one,four thousand,nine thousand,seven hundred and forty-three,a(one)hundred and seventy-four thousand,three hundred and one,seven hundred and fifty million,2.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，如：tenth（第十），但下面这些基数词在变序数词时，有特别的地方。如：,A.one two three five eight nine twelve,first,second,third,fifth,eighth,ninth,twelfth,B.以-ty结尾的词，要先变-y为-i，再加-eth。如：twenty fortyC.以one,two,three,five,nine收尾的多位序数词，要照第一条方法变。如：twenty-one twenty-two thirty-five ninety-ninea hundred and fifty-three,twentieth,fortieth,twenty-first,twenty-second,thirty-fifth,ninety-ninth,a hundred and fifty-third,基数词（分子）序数词（分母），分子大于，分母用复数如：2/3 7/9 5/12,one-fourth,two-thirds,seven-ninths,five-twelfths,two and three-fifths,thirty and seven-eighths,3.分数词的读法,2,3,5,30,7,8,一些特殊的表达法,a/one half,a/one quarter,three quarters,小数的读法7.8 0.4 0.03 0.125 14.397,seven point eight,（zero）point four,（zero）point zero three,(zero)point one two five,fourteen point three nine seven,5)百分数的读法27%45%86%,twenty-seven percent,forty-five percent,eighty-six percent,Thankyou,Practice Read the following numbers.,2/55/89/103/8,two-fifths,five-eighths,nine-tenths,three-eighths,0.50.81.23796,000,point five,point eight,one point two three,seven hundred,ninety-six thousand,Find the mistakes,52,470,383-fifty-two million,four hundred and seventy,three hundred and eighty-three,100,000,000-hundred million,365,528,462-three hundred and sixty-five million,five hundred and twenty-eight thousand,four hundred and sixty-two,1,000,000,000-one thousand/one billion,52,470,383-fifty-two million,four hundred and seventy thousand,three hundred and eighty-three,100,000,000-one hundred million,Now lets say:2/5 5/8 9/10 3/8 5/6 1/2 1/4 3/4,practice,Count these,What is of 6,000,000?How much is 35,246,000 plus 12,800,000?What is 25%of 200,000,000?How much is 260,408,396 plus 5,284,700?What is of 1,000,500,000?What is 10%of 800,000,000?,exercise 9 on P 93Answers:B B C B,Work in pair,We write,We say,400,0002,000,0005,100,00048,000,50050,567,489123,456,789,four hundred thousand,two million,five million one hundred thousand,forty-eight million,five hundred,fifty million,five hundred and sixty-seven thousand four hundred and eighty-nine,one hundred and twenty-three million four hundred and fifty-six thousand seven hundred and eighty-nine,
