初一年级英语数词知识点讲解 知识点总结 数词分为基数词和序数词两种; (一)基数词在英语中表示数目的词称为基数词。 1.基数词的构成 (1)1-20 one,two,three,four,five,six,seven,eight,nine,ten,el even,twelve,thirteen,fourteen,fifteen, sixteen,seventeen,eighteen,nineteen,twenty (2)21-99 先说“几十”，再说“几”，中间加连字符。 23rarr;twenty-three,34rarr;thirty-four, (3)101-999先说“几百”，再加and,再加末两位数或末位数; 586rarr;five hundred and eighty-six,803rarr;eight hundred and three (4)l,000以上,先从右往左数，每三位数加一个“,”,第一个“,”前为thousand.第二个“,”前为million,第三个“,”前为billion,然后一节一节地表示。
9,785rarr;nine thousand, seven hundred and eighty-five 6,260,309rarr;six million two hundred and sixty thousand three hundred and nine 750,000,000,000rarr;seven hundred and fifty, billion 2.基数词的用法 (1)表示数量 Eg. 一 How many books would you like? 一I would like two. (2)表示号码 eg.My phone number is 6887789. (3)表示时间 eg.I watch CCTV News at seven oclock every evening. (4)表示“十”的数词的复数可以表示人的岁数或年代。 eg. He is in his early thirties.他有三十来岁(31-34岁)： This took place in the 1930s.这事发生在二十世纪三十年代; (5)表具体数字时,hundred,thousand,million用单
一．数词含义：数词分为基数词和序数词。表示数目和数量的词为基数词；表示数目顺序的 词为序数词。 二．基数词 1-100 (略) ten / one hundred / one thousand / ten thousand / one hundred thousand one million / ten million / one hundred million / one billion 123one hundrend and twenty-three 1,234 one thusand, two hundred and thirty-four. 12,345 twelve thousand, three hundred and forty-five ( 千位与百位之间用逗号连接, 百位与十位之间用and连接, 十位与个位之间用连字 符- 连接 ) three hundred ( hundred 没有复数, 不能加s； hundred 前面只能用数字, 不能用 many 和 a few ) hundreds of ( hundred 如果加s, 后面必须接 of ) five thousand ( thousand 没有复数, 不能加s；thousand 前面只能用数字, 不能用 many 和 a few ) thousands of ( thousand 如果加s, 后面必须接 of ) 三．讲解序数词 first second third fourth fifth sixth seventh eighth ninth tenth eleventh twelfth thirteenth fourteenth fifteenth sixteenth seventeenth eighteenth nineteenth twenty-first twenty-second twentieth thirtieth fortieth fiftieth sixtieth seventieth eightieth ninetieth one hundredth Lesson Three: 第三课 page four six three: 第463页 page five o seven: 第507 页 Room three o five: 第305房间： Seventy-six Chang’an Stree: 长安街76号 in his fifties: 在他50多岁的时候 January twenty-eighth February fourteenth October first
初中英语数词 讲解 数词分为基数词和序数词两种。表示数目或数量多少的词叫基数词；表示数目顺序的词叫序数词。 一、基数词 1.基数词就注意以下几点： （1）几十几的基数词的十位数与个位数之间要用连字符“-”连接。如： eighty-five 85 twenty-six 26 （2）三位数的基数词须在百位和十位（若无十位则和个位）之间用and连接。如：three hundred and sixty-five 365 two hundred and six 206 （3）基数词的复数形式。当基数词hundred，thousand，million，billion等词前有详尽数词或several修饰时，必须用单数。如： several hundred year“s ago几百年前 two thousand students两千个学生 2.基数词的分外用法： （1）表示“几十年代”或“几十岁”时，用逢十的基数词的复数形式。如：in the 1990“s 20世纪90年代 i n one“s twenties在某人20多岁时 （2）用在习语中。如： in twos and threes三三两两地
二、序数词 序数词应注意的几点事项： 1.多位数的基数词变成序数词时，只需将末位基数词变成序数词，前边的基数词不变。 如： forty-two 42 forty-second第42 nine-hundred 900 nine-hundredth第900 2.当序数词用阿拉伯数字表示时，必须在数字后加上序数词的最后两个字母。如：21st第21 32nd第32 3.序数词前大凡要用定冠词the，如果序数词前用a或an时，则表示“又一；再一”（没有详尽范围的限制）。如： Though he had failed twice，he wanted to try a third time. 尽管他已失败了两次，他还想再试一次。 The little monkey had had three apples，and he wanted to eat a fourth one.那只小猴子已经吃了3个苹果，他还想再吃一个。 三、分数和百分数 1.分数 （1）分数的分子用基数词，分母用序数词。如： one fifth五分之一 one tenth十分之一 （2）当分子大于1时，分母用序数词的复数。如：
英语上数词分为两大类：基数词和序数词 意义:序数词是指表示顺序的数词。 序数词其主要形式： （1）从第一至第十二：one—first two—second three—third four-fourth five—fifth six—sixth seven—seventh eight—eighth nine—ninth ten—tenth eleven—eleventh twelve—twelfth 大多的序数词都是由其相对应的基数词后面添加“th”构成。 （2）从第二十至第九十九整数第几十的形式由其对应的基数词改变结尾字母y为ie，再加“th”构成。twenty——twentieth thirty——thirtieth 表示第几十几时，用几十的基数词形式加上连字符“－”和个位序数词形式一起表示。thirty-first 第三十一fifty-sixth 第五十六seventy-third 第七十三ninety-ninth 第九十九 第一百以上的多位序数词 由基数词的形式变结尾部分为序数词形式来表示。 one hundred and twenty-first 第一百二十一one thousand，three hundr ed and twentieth 第一千三百二十 序数词的缩写 序数词的缩写形式有时，序数词可以用缩写形式来表示。主要缩写形式有。first—lst second—2nd third—3rd fourth—4th sixth—6th twentieth—20th twenty-third——23rd 其中lst，2nd，3rd为特殊形式，其它的都是阿拉伯数字后加上th。
初二上第二单元数词用法讲解与练习 英语中的数词包括基数词和序数词两大类，它们的用法非常复杂，为了便于同学们系统地复习数词，现就初中阶段数词的主要内容作以下归纳。 基数词序数词基数词序数词基数词序数词 one first thirteen thirteenth thirty thirtieth two second fourteen fourteenth forty fortieth three third fifteen fifteenth fifty fiftieth four fourth sixteen sixteenth sixty sixtieth five fifth seventeen seventeenth seventy seventieth six sixth eighteen eighteenth eighty eightieth seven seventh nineteen nineteenth ninety ninetieth eight eighth twenty twentieth One hundred One hundredth nine ninth twenty-one twenty-first One hundred and one One hundred and first ten tenth twenty-two twenty-second One hundred and thirty-five One hundred and thirty-fifth eleven eleventh twenty-three twenty-third thousand thousandth twelve twelfth twenty-four twenty-fourth million millionth 一、基本构成(一)基数词——从1数到n 1. 1—12的基数词是独立的单词，即：one，two，three，four，five，six，seven，eight，nine，ten，eleven，twelve。 2. 13—19的基数词以-teen结尾。如：fourteen，seventeen等，但13，15，18较特殊，13—thirteen 15—fifteen 18—eighteen。 3. 20—90的整十位均以-ty结尾。如：sixty，ninety，但20，30，40，50，80较特殊，20—twenty，30—thirty，40—forty ，50—fifty ，80—eighty。 4. 十位数与个位数之间要加连字符号“-”，如：28—twenty-eight，96—ninety-six。 5. 百位和十位(若无十位则和个位)之间加and，如：148—one hundred and forty-eight ，406—four hundred and six。 6. hundred(百)，thousand(千)，million(百万)，billion(十亿)等前面即使有具体的数词，也不能在它们的后面加s。如：600—six hundred，8百万—eight million。但是与“of”，和不确定的数，如some等连用时要加“s”。 7. 1000以上的数字，从后往前数每三位加一个逗号“，”第一个逗号前为千(thousand)，第二个逗号前为百万(million)，第三个逗号前为billion(十亿)。英语中无“万”这个词，我们可以用“几十个千(th ousand)”表示几万，“几百个千(thousand)”表示“几十万”。如：2，510＝two thousand five hundred and
七年级上数词专项练习（一） 1 ( ) 1 There are ___ days in a year. A. three hundreds sixty-five B. three hundreds and sixty-five C. three hundred and sixty-five D. three hundred and sixty five ( ) 2 There are____ students in this school. A. eight hundreds and forty-six B. eight hundred and forty six C. eight hundred and forty-six D. eight hundred forty-six 2 ( ) 1 ______people visit this museum every day. A. Hundred B. Hundreds C. Hundred of D. Hundreds of ( ) 2 There are two___ people in the meeting room. A. hundred B. hundreds C. hundreds of D. hundred of ( ) 3 Every year ___ watch NBA on TV. A. million people B. millions of people C. millions people D. million of people ( ) 4 ____ trees have been planted in our school in the past 10 year s. A. Thousands of B. Two thousands C. Thousand of D. Two thousand of ( ) 5 Look! There are ___ in the sky. A. thousand stars B. thousand of stars C. thousands of stars D. thousands of star 3 ( ) 1 My brother is in____. A. Three Class, One Grade B. Class Three, Grade One C. Grade One, Class Three D. class three, grade one ( ) 2 We are going to learn___ this term. A. book six B. six book C. the book six D. Book Six ( ) 3 Please turn to___. Let's read the text aloud. A. Page Two B. the page two C. second page D. page second 4 ( ) 1 We can say the number 78, 645 in English like this____. A. seventy-eight thousand and six hundred and forty-five B. seventy-eight thousand six hundred and forty five C. seventy-eight thousand six hundred and forty-five D. seventy eight thousand six hundred and forty-five
初一英语数词专项练习1 写出下列基数词和序数词。 1 2 3 5 9 12 13 20 71 22 二、 英汉互译。 第五单元 Lesson Eight 第59中学 五年级四班 Bus No.4 7:07 7+8=15 1994 年 352 Team Seven 第三行 第 5 小学 five little mice 三、 用括号内所给数词的正确形式填空。 83 28 34 36 one o eight 第六号房间 47 1. We are in Class （3） . 2. We have ___ （ 12） mon ths of the year. December is the ______ （ 12） one. 3. This is my____ （ 1） bag. 4. My birthday is Dec. ___ （ 21）. 5. I have _____ （ 3） books. I like my （ 3） book. 四、选择题。 1. My gran dmother is ___ old. A. seve ntieth B. seve nty year C. seve nty years D. seve nties 2. ____ people visit this museum every day. A. Hun dred B. Hun dreds C. hu ndred of D. Hu ndreds of 3. There are two ____ people in the meeti ng room. A. hun dred B. hun dreds C. hun dreds of D. hun dred of 4. We can say the number 78,645 in En glish like this_______ . A. seve nty-eight thousa nd and six hun dred and forty-five B. seve nty-eight thousa nd six hun dred and forty five C. seve nty-eight thousa nd six hun dred and forty-five D. seve nty eight thousa nd six hun dred and forty-five 5. Mon day is the sec ond day, and __ .A. Tuesday is the fourth B. Thursday is fifth C. the sec ond day is Tuesday 6. The year 1999 "should be read A. nin etee n and nin ety-nine C. one thousa nd nine hun dred nin ety-nine 7. There are D. the sec ond day is Thursday （应该读作）The year _____ ." B. nin etee n nin ety-nine D. nin etee n hun dred and nin ety-nine mon ths in a year. December is the __ month of the year. A. twelve; twelve B. twelve; twelfth C. twelfth; twelve 8. What ' the date today? It is_____ . A. Friday B. time to go C. cloudy D. June 4th 9. What is five and eight? A. Twelve B. Thirteen C. Fourteen 10. What ___ is Lily in? She is in ___ . A. Row; row five B. Row; Row Five C. row; Row Five D. twelve; twelveth D. Fifteen D. row; row Five 最佳答案 数词专项练习 （一）
数词习题精选 1. Which number is wrong? _______. （） A. Ninety B. Ninteen C. Ninth D. Nineteenth 2. -How old is your daughter? （） -_________. We had a special party for her _________ birthday last week. A. Ninth; ninth B. Nine; nine C. Ninth; nine D. Nine; ninth 3. There are ____ students in our school. （） A. four—hundred and forty—five B. four hundred and forty—five C. four hundreds and forty—five D. four hundred and forty five 4. The number 4,123 is read _______. （） A. four thousand one hundred and twenty-three B.four thousand and one hundred twenty-three C. four thousand and a hundred and twenty-three D. four thousands a hundred and twenty-three 5．How do you say 15,858 in English? （） A. Fifteen thousands, eight hundred and fifty-eight B. Fifteen thousand, eight hundreds and fifty eight. C. Fifteen thousand, eight hundred and fifty-eight D. Fifteen thousand and eight hundred and fifty-eight. 6. Tuesday is the _______ day of a week in English. （） A. first B. second C. third D. Fourth 7. The students went out of the room___. （） A. one by two B. one by one C. two by another D. one by the other 8. I've been a student there for nearly two and _______ half years. （） A.a B.an C.the D./ 9. --- How soon will you finish your work? --- In about _______. （） A. one and a half month B. one month and a half C. one and half a month D. a month and half 10. It took me ________ to find out the key to the drawer. （） A. one and half hours B. one and a half hours C. one and a half hour D. one and half hour 11. Do you think there is any room for us ________ ? （） A.two B. the two C. second D. the second 12. Which of the following is wrong? ________. （） A. He is a fifteen-year-old boy. B. He is at the age of 15. C. He is a boy of 15. D. He is fifteen year old. 13．—How old is Steve? （）—He is ____________ and he has an ___________ sister. A. 13-year-old; 10 years old B. 13 years old; 11-year-old C. 13 years old; 10-years-old D. 13-years-old; 11-years-old 14. Their house is about ___ as big as ours. （） A. times three B. three time C. time three D. three times 15．of the coats made of cotton. They feel comfortable. （）A.Two-thirds; is B. Two-thirds; are
实用精品文献资料分享 七年级英语上册知识点汇总：基数词讲解 七年级英语上册知识点汇总：基数词讲解 一、初一英语语法讲解数词的分类：数词分为序数词(one, two, three, four…)、基数词(first, second, third, fourth…)和分数词(one third, two thirds, four fifths…)。表示单一的数词与单数名词连用，但有些数词和名词连用，表示复数时仍用单数形式 four dozen eggs(四十八个鸡蛋)， two score people (四十个人)，three hundred years(三百年)， a few thousand horses (好多少千匹马)， eight million pounds (八百万英磅)。 初一英语语法提醒您注意：被这些数词润饰的名词一定是复数，反过来，如果被修饰的名词是复数，那么就用数词的单数形式，如 a(one) thousand years：二、对"千""百"";百万"的数词：初一英语语法假如"hundred"、"thousand"跟"million"前边不表示数字和其余限定词修饰时(如"a few"、"one"、" ten"等)，则可用复数形式，表示不定数，后面再加"of+名词"：hundreds of (数以百计的)，thousands and thousands of (成千上万的)，millions of (数以百万计的) 三、初一英语语法讲解对于连字符衔接的数词：在连字符连接的" 数词+个别名词+形容词"中，"数词"跟"一般名词"都要用单数情势 a three?year?old girl, a three?mile?long walk 四、基数词中表现"多少十"的复数形式可能表白人的岁数或年代 He is in his late twenties. 他快30了。 五、初一英语语法分数词的概念：分数词是由基数词和序数词组成的，分子是基数词，分母是序数词。除了表示"1"以外，分母序数词都用复数 六、百分数：表示百分比的percent用单数，如ninty percent(90%)
英语------数词 ▲掌握分数、时间、日期的表达法。 【复习要点 （一）基数词 基数词用来表示数目，或者说表示数量的词叫基数词。最基本的基数词如下表所示。 1 one 11 eleven 100 a hundred 2 two 12 twelve 20 twenty 1000 a thousand 3 three 13 thirteen 30 thirty 1，000，000 a million 4 four 14 fourteen 40 forty 10，000，000 ten million 5 five 15 fifteen 50 fifty 100，000，000 a hundred million 6 six 16 sixteen 60 sixty 1，000，000，000 a billion 7 seven 17 seventeen 70 seventy 8 eight 18 eighteen 80 eighty 9 nine 19 nineteen 90 ninety 10 ten 说明： 1．13—19是由个位数加后缀-teen构成。注意其中13、15的拼写是thirteen和fifteen。2．20—90由个位数加后缀-ty构成，注意其中20—50的拼写分别是twenty, thirty, forty 和fifty;80的拼写是eighty。 3．其它非整十的两位数21—99是由整十位数加连字符“-”，再加个位数构成。如：81 eighty-one。 4．101—999的基数词先写百位数，后加and再写十位数和个位数。如：691 six hundred and ninety-one。 5．1000以上的基数词先写千位数，后写百位数，再加and，最后写十位数和个位数。 如：5893 five thousand eight hundred and ninety-three。在基数词中只有表示“百”、“千”的单位词，没有单独表示“万”、“亿”的单位词，而是用thousand（千）和million（百万）来表达，其换算关系为：1万=10 thousand;1亿=100 million; 10亿=a thousand million=a billion。6．多位数的读法： 1）1000以上的多位数，要使用计数间隔或逗号“，”。即从个位起，每隔三位加一个间隔或逗号。第一个间隔或逗号前是thousand（千），第二个间隔或逗号前是million（百万），第三个间隔或逗号前是a thousand million或a billion(十亿)。 2）每隔三位分段以后就都成了101—999。读的时候十位数（或个位数）的前面一般要加and。如： 888，000，000读作：eight hundred and eighty-eight million。 基数词的用法： 1. 基数词在句中的作用 基数词的作用相当于名词和形容词，在句中可作定语、主语、宾语（介宾）、表语、同
基数词序数词练习题 I. Choose the best answer 1. Please turn to ______. A. Page 11 B. the 11 st page C. page 11 D. page the 11 th 2. At night we can see ______ stars in the sky. A. thousands and thousands of B. thousand and thousands of C. a thousand and thousands D. thousand and thousand 3. There are some _____ in our classroom. A. hundred of books B. the hundreds of books C. hundreds of books D. hundred of book 4. I have been to the village ________. A. a hundred time. B. hundred times C. hundreds of times D. hundred of times 5. There are ____ students in our school. A. four —hundred and forty —five B. four hundred and forty —five C. four hundreds and forty —five D. four hundred and forty five 6. The teacher told me to go over _____ lessons. A. thirst three B. the three first C. three the first D. the first three 7. May is ____ of a year. A. the fifth months B. the fifth month C. the five months D. the five month 8. We live in ______. A. the twenty-first century B. the century twenty-one C. century twenty-one D. the century twenty-first 9. He said he was going to be free in _______. A. one and a half hour B. one hour and half C. one and half hours D. an hour and a half 10. ---How many English books are there on the table? ---There is only _____English book on it. A. a B. an C. one D. the 11. Mr Smith stayed in _____ last night. A. Room 403 B. the Room 403 C. the 403 room D. 403 the room 12. The road is _________. A. two thousand and five hundred metres long B. two thousands metres long C. long one thousand five hundred metre D. a thousand and five hundreds metres long 13. He joined the army on ______ of May 1980. A. 1 st B. the 1 C. first D. the first 14. Is Sunday the ____ day of the week? A. a B. one C. once D. first 15. March the _____ is Women ’s Day. A. eighth B. ninth C. tenth D. eight 16. September is the _____month of the year. A. nineth B. ninth C. nine D. the twelveth 17. December the ____ is Christmas. A. twenty-five B. twenty-fifth C. twentieth-five D. twenty-five 18. Another way of saying Lesson 12 is __________. A. Lesson ten-two B. Lesson Ten-second C. the Twelfth Lesson D. Twelfth lesson
▲掌握分数、时间、日期的表达法。 【 复习要点 （一）基数词 基数词用来表示数目，或者说表示数量的词叫基数词。最基本的基 说明： 1．13—19是由个位数加后缀-teen 构成。注意其中13、15的拼写是thirteen 和fifteen 。 2．20—90由个位数加后缀-ty 构成，注意其中20—50的拼写分别是twenty, thirty, forty 和fifty;80的拼写是eighty 。 3．其它非整十的两位数21—99是由整十位数加连字符“-”，再加个位数构成。如： 81 eighty-one 。 4．101—999的基数词先写百位数，后加and 再写十位数和个位数。如： 691 six hundred and ninety-one 。 5．1000以上的基数词先写千位数，后写百位数，再加and ，最后写十位数和个位数。 如：5893 five thousand eight hundred and ninety-three 。 在基数词中 只有表示“百”、“千”的单位词，没有单独表示“万”、“亿”的单位词，而是用thousand （千）和million （百万）来表达，其换算关系为：1万=10 thousand;1亿=100 million; 10亿=a thousand million=a billion 。 6．多位数的读法： 1）1000以上的多位数，要使用计数间隔或逗号“，”。即从个位起，每隔三位加一个间隔或逗号。第一个间隔或逗号前是thousand （千），第二个间隔或逗号前是million （百万），第三个间隔或逗号前是a thousand million 或a billion(十亿)。 2）每隔三位分段以后就都成了101—999。读的时候十位数（或个位数）的前面一般要加and 。如： 888，000，000读作：eight hundred and eighty-eight million 。 基数词的用法： 1. 基数词在句中的作用 基数词的作用相当于名词和形容词，在句中可作定语、主语、宾语（介宾）、表语、同位语等。 例如：Three and five is eight. 3+5=8 （作表语）How many oranges do you want?你要多少桔子？ I want eight. 我要八个。 （作宾语）There are eight boats in the lake. 湖里有八条小船。（作定语） 2． Hundred, thousand, million, dozen, score 这些词前面如有表示具体数 字的词，它们不能加 “s”,反之则须加 “s”, 并要与of 短语连用。例如：three hundred people, five thousand years ； thousands of people, hundreds of students, thousands of trees （二）序数词 表示顺序的词，叫序数词。序数词用来表示数词顺序。除特殊情况外，序数词一般都由相应的基数词加后缀-th 构成。 请见下表：
1. It is reported that the United States uses ________ energy as the whole of Europe. (广西卷) A. as twice B. twice much C. twice much as D. twice as much 【分析】答案选D。由twice(两倍)和energy后的as可知，此题是考查用“倍数+as+形容词原级+as”来表达倍数的方法。 2. The house rent is expensive, I’ve got about half the space I had at home and I’m paying ________ here. (上海卷) A. as three times much B. as much three times C. much as three times D. three times as much 【分析】答案选D。倍数three times要放在as的前面，后面省略as I paid at home。 3. With the help of the German experts, the factory produced ________ cars in 1993 as the year before. (上海卷) A. as twice many B. as many as twice C. as twice as many D. twice as many 【分析】答案选D。倍数放在as之前。此题与全国卷曾考过的一题几乎一样： After the new technique was introduced, the factory produced ________ tractors in 1988 as the year before. A. as twice many B. as many twice C. twice as many D. twice many as (答案选C) 4. Paper produced every year is ________ the world’s production of vehicles. (上海卷) A. the three times weight of B. three times the weight of C. as three times as heavier as D. three times as heavier as 【分析】答案选B。倍数three times要放在the weight of之前。若选项D中heavier改为heavy 也对。
英语数词及年月日用法 概说 1.定义和特征 1)表示"多少"和"第几"的词，叫做数词(numeral)。 2)数词与不定代词相似，其用法或者相当于形容词，或者相当于名词。 2.种类 1)基数词表示"多少"的词叫做基数词(cardinal numeral)，如：one (一)，twenty(二十)，hundred(百)等。 2)序数词表示"第几"的词叫做序数词(ordinal numeral)，如：first (第 一)，twentieth (第二十)，hundredth(第一百)等。 基数词 100以下的基本的墓数词 1 one[wQn] 11 eleven[i5levn] 2 two[tu:] 12 twelve[twelv] 3 three[Wri:] 13 thirteen [5We:5ti:n] 4 four[fC:] 14 fourteen 5 five [faiv] 15 fifteen [5fif5ti:n] 6 six[siks] 16 sixteen 7 seven [5sevn] 17 seventeen 8 eight [eit] 18 eighteen[5ei5ti:n] 9 nine[nain] 19 nineteen 10 ten[ten] 20 twenty [5twenti] 21 twenty-one [5twenti5wQn] 60 sixty 30 thirty [5WE:ti] 70 seventy 40 forty [5fC:ti] 80 eighty 50 fifty[5fifti] 90 ninety 说明： 1)13-19皆以后缀-teen[5ti:n]结尾，它们都有两个重音。注意thirteen，fifteen，eighteen的发音和拼法。 2) 20-90第十位数的整数均以后缀-ty[ti]结尾。 3)十位数和个位数之间须用连字号"-"。如：twenty-one(二十一)，fifty-five(五十五)，ninety-nine(九十九)等。 100以上的基本的基数词 100 hundred [5hQndrid] 1,000 thousand [5WauzEnd] 1,000,000 million [5niljEn]百万 100,000,000 hundred million 一亿 1,000 million (=billion)十亿