1、两位数表示法21-30twenty-onetwenty-twotwenty-threetwenty-fourtwenty-fivetwenty-sixtwenty-seventwenty-eighttwenty-ninethirty31-40thirty-onethirty-twothirty-threethirty-fourthirty-fivethirty-sixthirty-seventhirty-eightthirty-nineforty练一练45 .57 .66 .79 .88 .51 .32 .24 .forty-fivefifty-sevensixty-sixseventy-ni
2、neeighty-eightfifty-onethirty-twotwenty-four三位数表示法101 203309404507two hundred and threethree hundred and ninefour hundred and fourfive hundred and sevenone hundred and one813719612911eight hundred and thirteenseven hundred and nineteensix hundred and twelvenine hundred and eleven101-999:1-9 hundred
3、and 1-99 121 237345499577two hundred and thirty-seventhree hundred and forty-fivefour hundred and ninty-ninefive hundred and seventy-sevenone hundred and twenty-one四位数及以上表示法四位数及以上表示法:从后往前，每三位画一个逗号 需要加单位的加上单位（单位为 thousand(千）,million(百万),billion(十亿)从前往后读，记得加单位 最后三位如果小于等于，需要加怎么加单位：XXX,XXX,XXX,XXXmillio
4、nthousandbillion987,654,321,123nine hundred and eighty-seven billion six hundred and fifty-four million three hundred and twenty-one thousand one hundred and twenty-three87,054,012,123eighty-seven billion fifty-four million twelve thousand one hundred and twenty-three7,004,001,123seven billion four
5、million one thousand one hundred and twenty-three200,000,305,100two hundred billion three hundred and five thousand and one hundred21,000,90twenty-one million and ninty1,000,001one million and one1,010,101one million ten thousand one hundred and one5,100five thousand and one hundred10,210ten thousan
6、d two hundred and ten50,012fifty thousand and twelve120one hundred and twenty200,000,000,000two hundred billion,000,000,000t billion101,000,000one hundred and one million,00000 12000112678 2100000090 345780001 90979099 8012000 621100 12000 2300 1801200011267812,000,112,678twelve billion one hundred
7、and twelve thousand six hundred and sventy-eight 21000000902,100,000,090two billion one hundred million and ninty 345,780,001three hundred and forty-five million seven hundred and eighty thousand and one 3457800019097909990,979,099ninty million nine hundred and seventy-nine thousand and ninty-nine8012000621,100six hundred and twenty-one thousand and one hundred6211008,012,000 eight million twelve thousand1200012000twelve thousand23002,300two thousand three hundred180180one hundred and eighty
