1-20: first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth, sixteenth, seventeenth, eighteenth, nineteenth and twentieth.

2 1-35: 21st, 22nd, 23rd, 24th, 25th, 26th, 27th, 28th, 29th, 30th, 31st, 32nd, 33rd, 34th and 35th.

II. Abbreviations of ordinal numbers of 1-35 are as follows:

1- 10: 1 1、2、3、4、5、6、7、8、9、 10

1 1-20: 1 1th、 12th、 13th、 14th、 15th、 16th、 17th、 18th、 19th、20th

2 1-30:2 1st、22、23、24、25、26、27、28、29、30

3 1-35:3 1st、32、33、34、35

Extended data

The main abbreviation forms of 1-35 ordinal number mainly have the following rules:

1. If the mantissa of a number is 1, 2, 3, then 1 is followed by ST (the first abbreviation), 2 is followed by nd (the second abbreviation), and 3 is followed by RD (the third abbreviation).

First, first (1st); Second, second (2nd); ; Third, third (3); 21st (21st); The 22nd (22nd? ); The 23rd session (23rd session).

2. Except 1st, No.2 and No.3, all abbreviations of ordinal numbers are Arabic numerals followed by th.

Fourth, fourth (4); Sixth, sixth (6); ; Eleventh, eleventh (1 1 time); +0 times); Twelfth, twelfth (12 times); Thirteenth, thirteenth (13); 14th, 14th (14); Fifth, fifth (15); Twentieth, twentieth (20).