numbers.ppt

1、英语中基数词、序数词、分数、小数和百分数的读法,Learning Goals,1. 基数词的读法,23 89,twenty-three,eighty-nine,223,416,809,two hundred and twenty-three,four hundred and sixteen,eight hundred and nine,两位数：先“几十”，再“几”，中间用连字符。 三位数：先“几百”，再加_, 再加“几十”。,and,1001,6666,2032,8989,5678,two thousand and thirty-two,one thousand and one,five th

2、ousand, six hundred and seventy-eight,six thousand, six hundred and sixty-six,eight thousand, nine hundred and eighty-nine,11111111111,eleven billion, one hundred and eleven million, one hundred and eleven thousand, one hundred and eleven,1000以上的数从后向前数，每三位数加“,”；第一个“,”号前为_; 第二个“,”号前为_; 第三个“,”号前为_。,th

3、ousand,million,billion,9,999 nine _, nine hundred and ninety-nine 99,999 ninety-nine _, nine hundred and ninety-nine 999,999 nine hundred and ninety-nine _, nine hundred and ninety-nine,thousand,thousand,thousand,9,999,999,99,999,999,nine _, nine hundred and ninety-nine _, nine hundred and ninety-ni

4、ne,ninety-nine _, nine hundred and ninety-nine _, nine hundred and ninety-nine,million,thousand,million,thousand,9,999,999,999,nine _nine hundred and ninety-nine _, nine hundred and ninety-nine _, nine hundred and ninety-nine,thousand,billion,million,4 44 444 4,444 44,444 444,444 4,444,444 44,444,44

5、4 444,444,444 4,444,444,444,challenge,How to say? 100 1,000 10,000 100,000 1,000,000 10,000,000 100,000,000 1,000,000,000,one hundred,one thousand,ten thousand,one hundred thousand,one million,ten million,one hundred million,one billion,750,000,000,seven hundred and fifty million,796,000,seven hundr

6、ed and ninety-six thousand,Can you say the following in English correctly?,532,621,000,five hundred and thirty two million, six hundred and twenty one thousand,10,455,001,000,ten billion, four hundred and fifty five million, one thousand,2. 序数词的读法,序数词一般以与之相应的基数词加-th构成，如：tenth（第十），但下面这些基数词在变序数词时， 有特别

7、的地方。,A. one two three five eight nine twelve,first,second,third,fifth,eighth,ninth,twelfth,B. 以-ty结尾的词，先变-y为-i，再加-eth。 e.g. twenty forty C. 以one, two, three, five, nine收尾的多位数词，要照第一条方法变。 e.g. twenty-one twenty-two ninety-nine a hundred and fifty-three ,twentieth,fortieth,twenty-first,twenty-second,ni

8、nety-ninth,a hundred and fifty-third,e.g. 1 / 4 2 / 3 7 / 9 5 / 12,one-fourth,two-thirds,seven-ninths,five-twelfths,3. 分数词的读法,分子用_表示，分母用_表示，分子大于1时，序数词要用_。,基数词,序数词,复数,特殊的表达法,1/2 1/4 1/3 3/4 1/5 1/8 1/9,a / one half,a / one quarter,three quarters,a third,one-fifth,one-eighth,one-ninth,特殊的表达法,1,1,2,1,4

9、,5,one point five,one and a half,one point eight,one and four fifths,2,5,3,two point six,two and three-fifths,30,9,21,thirty and nine twenty-firsts,Now say these fractions. 2/5 5/8 9/10 3/8 5/6,two-fifths,five-eighths,nine-tenths,three-eighths,five-sixths,Exercises,4. 小数的读法,7.8 0.125 14.397 120.56 5

10、,179.01,seven point eight,zero point one two five,fourteen point three nine seven,one hundred and twenty point five six,five thousand, one hundred and seventy-nine point zero one,小数的读法：整数读法不变，然后加上_, 其后的数字_读出来。,point,从左至右依次,0.123,Special,zero point one two three,point one two three,0.5 0.8 0.76 1.23,point five point eight point seven six one point two three,Exercises,23.45 100.32 87.675 7.564,twenty-three point four five,one hundred point three two,eighty-seven point six seven five,seven point