The abbreviation of ordinal numbers is formed using the number and the last two letters of the word. The rules for the written words are the same as those of ordinal numbers (we use a hyphen for tens and for hundreds, thousands and millions, we use “and”).
1st (first), 2nd (second), 3rd (third), 7th (seventh), 15th (fifteenth),
20th (twentieth), 23rd (twenty-third), 31st (thirty-first)…
| Numbers | |
|---|
| 1st | first |
| 2nd | second |
| 3rd | third |
| 4th | fourth |
| 5th | fifth |
| 6th | sixth |
| 7th | seventh |
| 8th | eighth |
| 9th | ninth |
| 10th | tenth |
| 11th | eleventh |
| 12th | twelfth |
| 13th | thirteenth |
| 14th | fourteenth |
| 15th | fifteenth |
| 16th | sixteenth |
| 17th | seventeenth |
| 18th | eighteenth |
| 19th | nineteenth |
| 20th | twentieth |
| 21st | twenty-first |
| 22nd | twenty-second |
| 30th | thirtieth |
| 40th | fortieth |
| 50th | fiftieth |
| 60th | sixtieth |
| 70th | seventieth |
| 80th | eightieth |
| 90th | ninetieth |
| 100th | hundredth |
| 101st | hundred and first |
| 200th | two hundredth |
| 1,000th | thousandth |
| 10,000th | ten thousandth |
| 100,000th | hundred thousandth |
| 1,000,000th | millionth |
La abreviatura de los números ordinales se forma con el número en cifra seguido por las últimas dos letras de la palabra completa. Las decenas, millares y el millón se unen con un guión o “and”, al igual que los números cardinales.
1st (first), 2nd (second), 3rd (third), 7th (seventh), 15th (fifteenth),
20th (twentieth), 23rd (twenty-third), 31st (thirty-first)…
| Números | Inglés |
|---|
| 1st | first |
| 2nd | second |
| 3rd | third |
| 4th | fourth |
| 5th | fifth |
| 6th | sixth |
| 7th | seventh |
| 8th | eighth |
| 9th | ninth |
| 10th | tenth |
| 11th | eleventh |
| 12th | twelfth |
| 13th | thirteenth |
| 14th | fourteenth |
| 15th | fifteenth |
| 16th | sixteenth |
| 17th | seventeenth |
| 18th | eighteenth |
| 19th | nineteenth |
| 20th | twentieth |
| 21st | twenty-first |
| 22nd | twenty-second |
| 30th | thirtieth |
| 40th | fortieth |
| 50th | fiftieth |
| 60th | sixtieth |
| 70th | seventieth |
| 80th | eightieth |
| 90th | ninetieth |
| 100th | hundredth |
| 101st | hundred and first |
| 200th | two hundredth |
| 1,000th | thousandth |
| 10,000th | ten thousandth |
| 100,000th | hundred thousandth |
| 1,000,000th | millionth |
