资源简介

(共18张PPT)
两位数表示法
21 - 30
twenty - one
twenty - two
twenty - three
twenty - four
twenty - five
twenty - six
twenty - seven
twenty - eight
twenty - nine
thirty
31 - 40
thirty - one
thirty - two
thirty - three
thirty - four
thirty - five
thirty - six
thirty - seven
thirty - eight
thirty - nine
forty
练一练
45 .
57 .
66 .
79 .
88 .
51 .
32 .
24 .
forty - five
fifty - seven
sixty - six
seventy - nine
eighty - eight
fifty - one
thirty - two
twenty - four
三位数表示法
101
203
309
404
507
two hundred and three
three hundred and nine
four hundred and four
five hundred and seven
one hundred and one
813
719
612
911
eight hundred and thirteen
seven hundred and nineteen
six hundred and twelve
nine hundred and eleven
101-999: 1-9 hundred and 1-99
121
237
345
499
577
two hundred and thirty - seven
three hundred and forty - five
four hundred and ninty - nine
five hundred and seventy -seven
one 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１００，需要加ａｎｄ
怎么加单位：
XXX, XXX, XXX, XXX
million
thousand
billion
987,654,321,123
nine hundred and eighty-seven billion six hundred and fifty-four million three hundred and twenty-one thousand one hundred and twenty-three
87,054,012,123
eighty-seven billion fifty-four million twelve thousand one hundred and twenty-three
7,004,001,123
seven billion four million one thousand one hundred and twenty-three
200,000,305,100
two hundred billion three hundred and five thousand and one hundred
21,000,90
twenty-one million and ninty
1,000,001
one million and one
1,010,101
one million ten thousand one hundred and one
5,100
five thousand and one hundred
10,210
ten thousand two hundred and ten
50,012
fifty thousand and twelve
120
one hundred and twenty
200,000,000,000
two hundred billion
３１,000,000,000
tｈｉｒｔｙ－ｏｎｅ billion
101,000,000
one hundred and one million
３０,000
ｔｈｉｒｔｙ　ｔｈｏｕｓａｎｄ
８00
ｅｉｇｈｔ　ｈｕｎｄｒｅｄ
12000112678
2100000090
345780001
90979099
8012000
621100
12000
2300
180
12000112678
12,000,112,678
twelve billion one hundred and twelve thousand six hundred and sventy-eight
2100000090
2,100,000,090
two billion one hundred million and ninty
345,780,001
three hundred and forty-five million seven hundred and eighty thousand and one
345780001
90979099
90,979,099
ninty million nine hundred and seventy-nine thousand and ninty-nine
8012000
621,100
six hundred and twenty-one thousand and
one hundred
621100
8,012,000
eight million twelve thousand
12000
12000
twelve thousand
2300
2,300
two thousand three hundred
180
180
one hundred and eighty

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