基数词和序数词

1、基数词基数词 Write down the numbers in English and read them aloud. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 30 40 50 60 70 80 90 100zeroonetwothreefourfivesixseveneightnineteneleventwelvethirteenfourteenfifteensixteenseventeeneighteennineteentwentytwenty-onethirtyfortyfiftysixtyseventyeigh

2、tyninetyhundred 101 110 122 143 1,000 1,000,000 1,000,000,000one hundred and oneone hundred and ten one hundred and twenty-twoone hundred and forty-threeone thousand（千）（千）one million(百万）百万）one billion(十亿）十亿）1, 000, 000, 000billionmillion thousand1231,23412,345123,3451,234,567one hundred and twenty-t

3、hreeone thousand, two hundred and thirty-fourtwelve thousand, three hundred and forty-fiveone hundred and twenty-three thousand, three hundred and forty-fiveone million two hundred and thirty-four thousand five hundred and sixty-sevencomma 逗号逗号英语中四位数和四位数以上数字的读法：英语中四位数和四位数以上数字的读法：从数字的右端向左端数起，每三位数加一个从

4、数字的右端向左端数起，每三位数加一个逗号逗号“ , ”。从右开始，第一个。从右开始，第一个“ , ”前的数字前的数字后添加后添加 thousand，第二个，第二个 “ , ” 前面的数字前面的数字后添加后添加 million，第三个，第三个“ , ”前的数字后添加前的数字后添加 billion。然后一节一节分别表示，两个逗号之。然后一节一节分别表示，两个逗号之间最大的数为百位数形式。间最大的数为百位数形式。 7,000 28,000 135,000 7,000,000 4,500,000 79,000,000 350,000,000 21,000,000,000Lets practise!se

5、ven thousandtwenty-eight thousandone hundred and thirty-five thousandseven millionfour million and five hundred thousandseventy-nine million three hundred and fifty milliontwenty-one billion2,648 16,250,0645,237,166,234two thousand, six hundred and forty-eightsixteen million, two hundred and fifty t

6、housand and sixty-fourfive billion, two hundred and thirty-seven million, one hundred and sixty-six thousand, two hundred and thirty-four8,742 2,463,128 1,370,000,0002,000,030,000Listen and repeat the numbers.eight thousand, seven hundred and forty-twotwo million, four hundred and sixty-three thousa

7、nd, one hundred and twenty-eightone billion, three hundred and seventy milliontwo billion and thirty thousandP73序数词序数词 first 1st second 2nd third 3rd fourth 4th fifth 5th sixth 6th seventh 7th eighth 8th ninth 9thtwelfth 12thtwentieth 20ththirtieth 30thfortieth 40thfiftieth 50thsixtieth 60thseventie

8、th 70theightieth 80thninetieth 90th1. 序数词一般由基数词后加序数词一般由基数词后加th构成，前面构成，前面一般加定冠词一般加定冠词the。第第18第第2002. 以以y结尾的基数词构成序数词时，先把结尾的基数词构成序数词时，先把y改成改成i，再加，再加eth。第第50 第第203. 不规则的序数词有以下几个不规则的序数词有以下几个first, second, third, fifth, eighth, ninth,twelfth（一定要记住）（一定要记住）the eighteenththe two hundredththe fiftieththe twen

9、tieth4. 表示第几十几时，十位用基数词，表示第几十几时，十位用基数词，个位用序数词，十位和各位用连字符个位用序数词，十位和各位用连字符-连接连接第三十一第三十一第六十五第六十五 第七十四第七十四 第九十九第九十九第八十二第八十二thirty-firstsixty-fifthseventy-fourthninety-nintheighty-second1、This is Mr Whites _ visit in Beijing. He has been there twice before.A. two B. second C. three D. third2、There are _ mo

10、nths in a year. October is the _ month.A. twelve, ten B. twelfth , tenthC. twelve, tenth D. twelfth, ten3、There are _ people in Peters family. They live on the _ floor in tall building.A. six, eighteen B. six, eighteenthC. sixth, eighteenth D. sixth, eighteen4、 _ is the easiest of all.A. Lesson one

11、B. The Lesson oneC. Lesson First D. The first lesson5、 The foreign guests stayed in _ last night.A. Room 608 B. the Room 608C. the 608 room D. 608 the room 分数，小数，分数，小数， 百分比百分比分数、百分数、小数的表达方法分数、百分数、小数的表达方法 （以分数（以分数考法较为常见）考法较为常见）1. 分数分数: 分子用基数词，分母用序数词，分子分子用基数词，分母用序数词，分子大于一，分母加大于一，分母加s1/2 读作读作 2/3 读作读作1/13 读作读作 3/4 读作读作2小数小数,百分数的读法百分数的读法:小数点读成小数点读成point 3.6 读作读作百分号百分号% 读成读成 percent 50%读作读作one second（a half）two thirds 或者或者 two- thirdsone thirteenththree fourths或者或者three - quartersthree point sixfifty percentPractice talking(1) 36.9(2) 15 %(3) 3/5(4) 4/7(5) 3.141(6) 28 %thirty-six point ninefifte