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2.在句首的數目多用文字表示:

　　 　　a. One hundred and two voters are against the project.

1.一般來說, 兩位數以內的數目用文字表示, 超過兩位數的數目用數字, 如:

　　 　　a. There are forty-five students in our class.

　　 　　b. There are about 2,100 students in our school.

16. 序數詞前一般要用the, 但表示“又一,再一”的概念時, 序數詞前也可以用a / an

　　　　 a. They plan to buy a second house. 他們計劃再買第二房子

15. in the 1930s / 1930’s表示“在二十世紀三十年代”

14. in one’s + 整十數的復數形式, 表示“在某人幾十多歲的時候”, 如:

　　　　 a. He became famous in his thirties.

13.年齡的表示方法:

a. The boy is ten years old.

b. The boy is at the age of ten.

c. He is a ten-year-old boy.

d. The boy is of ten years.

12.某些數字的讀法與寫法, 如: $10.20讀作ten dollars and twenty cents;　 35^O 讀作thirty-five degree;　 -20^O 讀作twenty degree below zero或minus twenty degree;　 Napoleon III讀作Napoleon the third;　 World War II讀作World War two或the second world war.

11.小數: 小數點讀作point, 小數點前面的數字讀作一個完整的基數詞, 小數點后面的每位數字依次用基數詞讀出, 如: 3.4讀作three point four, 　0.2讀作zero point two,　 8.97讀作eight point nine seven

10.分數的表示法: 分子用基數詞, 分母用序數詞, 若分子大于1, 則分母用序數詞的復數形式, 如: one third, two tenths, two thirds. 有些分數可以用half, quarter表示, 如: three quarters

9.基數詞可以與度量單位連用: twenty meters deep, ten meters long, one hundred yards