Números ordinales

Ordinal Numbers 

La abreviatura de los números ordinales se forma con el número en cifra seguido por las últimas dos letras de la palabra completa:

1st (first), 2nd (second), 3rd (third), 7th (seventh), 15th (fifteenth), 20th (twentieth), 23rd (twenty-third), 31st (thirty-first)…

Las decenas, millares y el millón se unen con un guión al igual que los números cardinales, pero las unidades tienen la terminación “-th“, menos “first” que termina en “-st“, “second” que termina en “-nd“, y “third” que termina en “-rd“.

Los numeros English
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