1 first; ; Second; Third; Fourth; Fifth;

Sixth; Seventh; Eighth; Ninth; 10 day;

No. 1 1 Eleventh; ; No 12 12; ; 13 article 13; ; No 14 14;

No.65438 +05 fifth; Article 16 ofNo. 16; ; 17 article 17; ; Article 18 ofNo. 18; ;

19 article 19; ; Twentieth, twentieth; 2 1 21st; Twenty-second of the twenty-second session;

Twenty-third of the twenty-third session; Twenty-fourth of the twenty-fourth session; Twenty-fifth of the twenty-fifth session; 26th of the 26th;

Twenty-seventh; 28 th, 28 th; Twenty-ninth; Thirtieth; 3 1 third-first.

Extended data

1, ordinal number is a kind of numeral, which is mainly mentioned in English grammar and expressed as "which number" in Chinese. In addition, when describing your date of birth, you will also use ordinal numbers in your birthday. For example: May 1 day (May 5 1).

2. Memory formula

The basic order changes regularly, and -th is added at the end of the word.

One, two, three, special attention, suffix letters t, d, d.

Eight to t, nine to e, ve for f, ty for y, and e before th.

If you encounter dozens, use the base first and then use the order.

Baidu encyclopedia-ordinal number