1 to 12?

Write the first to twelfth ordinal numbers: 1 first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, 10,1eleventh, 6550.

Ordinal numbers can be expressed in abbreviated form. The main abbreviations are as follows:

first—— 1st

Second-second

Third-third

Fourth-fourth

Sixth-sixth

20th-20th

Twenty-third-twenty-third

Where 1st, 2 and 3 are special forms, and the rest are Arabic numerals followed by th.

In English extended information, when ordinal numbers are used, the definite article the should be added before, but in the following cases, no article is added:

1. When the ordinal number is preceded by an adjective subject pronoun or a noun possessive case, it is not.

My mother is the first teacher in my life. My mother was the first teacher in my life.

Tom is Lily's third boyfriend. Tom is Lily's third boyfriend.

2. When expressing fractions, ordinal numbers do not use before.

One fifth of the students here come from the countryside. The students here 1/5 come from rural areas.

Three quarters of the students here come from the countryside. Three quarters of the students here come from the countryside.