numbers.ppt

1、英語中基數(shù)詞、序數(shù)詞、分?jǐn)?shù)、小數(shù)和百分?jǐn)?shù)的讀法,Learning Goals,1. 基數(shù)詞的讀法,23 89,twenty-three,eighty-nine,223,416,809,two hundred and twenty-three,four hundred and sixteen,eight hundred and nine,兩位數(shù)：先“幾十”，再“幾”，中間用連字符。 三位數(shù)：先“幾百”，再加_, 再加“幾十”。,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以上的數(shù)從后向前數(shù)，每三位數(shù)加“,”；第一個“,”號前為_; 第二個“,”號前為_; 第三個“,”號前為_。,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. 序數(shù)詞的讀法,序數(shù)詞一般以與之相應(yīng)的基數(shù)詞加-th構(gòu)成，如：tenth（第十），但下面這些基數(shù)詞在變序數(shù)詞時， 有特別

7、的地方。,A. one two three five eight nine twelve,first,second,third,fifth,eighth,ninth,twelfth,B. 以-ty結(jié)尾的詞，先變-y為-i，再加-eth。 e.g. twenty forty C. 以one, two, three, five, nine收尾的多位數(shù)詞，要照第一條方法變。 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?jǐn)?shù)詞的讀法,分子用_表示，分母用_表示，分子大于1時，序數(shù)詞要用_。,基數(shù)詞,序數(shù)詞,復(fù)數(shù),特殊的表達(dá)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,特殊的表達(dá)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. 小數(shù)的讀法,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,小數(shù)的讀法：整數(shù)讀法不變，然后加上_, 其后的數(shù)字_讀出來。,point,從左至右依次,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