The first is a

Two seconds.

Three thirds

Four quarters

Five fifths

one-sixth

Seven sevenths

One eighth

In 1999

Ten tenths

Eleventh session

twelfth

Most ordinal numbers are formed by adding "th" to their corresponding cardinal words.

(2) From the 20th to the 90th integer, the decimal form is to change the ending letter Y to ie, and add "th" before its corresponding cardinal word.

twentieth

Thirty-thirty

When the decimal system is expressed, it is expressed in the form of decimal cardinal words plus hyphen "-"and unit ordinal number. Thirty-first thirty-first fifty-sixth fifty-sixth seventy-third ninety-ninth ninety-ninth ninety-ninth

Edit more than one hundred ordinal numbers in this paragraph.

It is expressed in the form of cardinal words, and the suffix is changed to ordinal form.

Articles 121, 121, 1020, 300 and 21.

Edit the abbreviations of ordinal numbers in this paragraph.

Abbreviated form of ordinal number Sometimes, ordinal number can be expressed in abbreviated form. The main abbreviation is.

First-first second-second third-third fourth-fourth sixth-sixth twentieth-twentieth.

23rd-23rd, where lst, 2 and 3 are special forms, others are Arabic numerals followed by th.