No. 1 1: the first one (1st)

Second: second (second)

Third place: third place

The fourth time: the fourth time

The fifth time: the fifth time

Sixth place: sixth place

The seventh time: the seventh time

Eighth: Eight (eighth)

Ninth time: the ninth time

No. 10 10: the tenth (10)

No. 1 1: 11th place (1/bit)

Issue 12 12: the 12th issue (12)

Rules for converting basic words of extended data into ordinal numbers;

(1) The cardinal number is changed to ordinal number, and -th is added at the end.

② One, two, three, special memory, suffix letters T, D, D.

③ Divide T by eight, E by nine, ve by F, Y by I by ty, and there is an e before th.

(4) Encountered dozens, before the cardinal number and after the ordinal number.

References:

Baidu encyclopedia-ordinal number