1. Unit 5 numbers

2. 规律是： 在百位和十位之间用“and” 来连接，如果十位数为零，就在百位数和个位之间用“and”连接。
三位数以上的读法：
100读成 one hundred; 900读成nine hundred; 注意hundred 后不加“s”
180 读成one hundred and eighty; 893读成eight hundred and ninety-three; 706读成seven hundred and six.
规律是： 在百位和十位之间用“and” 来连接，如果十位数为零，就在百位数和个位之间用“and”连接。

3. 1，000 one thousand 1,000,000 one million
10,253 读成 ten thousand two hundred and fifty-three
764,395,034 读成 seven hundred and sixty-four million three hundred and ninety-five thousand and thirty-three

4. Let’s read.
115,106
one hundred and fifteen thousand one hundred and six
257,935,003
two hundred and fifty-seven million nine hundred and thirty-five thousand hundred and three

5. 7,200,000 读成 seven million two hundred thousand
12,275,000
读成 twelve million two hundred and seventy-five thousand

6. 3,500,000读成 three million five hundred thousand
7,172,091读成seven million one hundred and seventy-two thousand and ninety-one
8,297,900读成 eight million two hundred and ninety-seven thousand nine hundred
3,500,000读成 three million five hundred thousand