How to use Ordinal numbers from 11 to 20 in Spanish

Learn how to use Ordinal numbers from 11 to 20, and what to use it for in Spanish.
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Ordinal numbers from 11 to 20

These are the ordinal numbers from 11 to 20:

11º/ª (11th) → Decimoprimero/a or undécimo/a (eleventh)
12º/ª (12th) → Decimosegundo/a or duodécimo/a (twelfth)
13º/ª (13th) → Decimotercero/a (thirteenth)
14º/ª (14th) → Decimocuarto/a (fourteenth)
15º/ª (15th) → Decimoquinto/a (fifteenth)

16º/ª (16th) → Decimosexto/a (sixteenth)
17º/ª (17th) → Decimoséptimo/a (seventeenth)
18º/ª (18th) → Decimoctavo/a (eighteenth)
19º/ª (19th) → Decimonoveno/a (nineteenth)
20º/ª (20th) → Vigésimo/a (twentieth)

Notes:

  • The ordinal numbers agree in gender and number with the noun they accompany.

Es mi decimosexto marido.

He is my sixteenth husband.

Es mi duodécima pinta de cerveza.

This is my twelfth pint of beer.

  • Although the ordinals from 11 to 20 are usually written together, forming a single word, it is also possible to write these numbers in two words, always respecting the rules of accentuation and agreement.

Es mi décimo sexto/decimosexto marido

He is my sixteenth husband.

Es mi décima tercera/decimotercera pinta de cerveza.

This is my thirteenth pint of beer.

  • Primero (first) and tercero (third) change to primer and tercer before masculine nouns.

Me regalaron una tortuga para mi decimotercer cumpleaños.

They gave me a tortoise for my thirteenth birthday.


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