Ordinal Numbers (Los números ordinales)

Primero, segundo y tercero son así:

1st / 1st	first
2nd / 2nd	second
3rd / 3rd	third

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), 20th (twentieth), 23rd (twenty-third)...

Del cuarto al decimoavo tienen la terminación "-th":

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

Las decenas, millares y el millón también tienen la terminación "-th":
Para los números 20th,30th,40th,50th,60th,70th,80th y 90th (la terminación suena como <tiez>)

	20th	twentieth
	30th	thirtieth
	40th	fortieth
	80th	eightieth
	100th	hundredth
	1000th	thousandth
	1,000,000th	millionth

Las decenas 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".

21st	twenty-first
22nd	twenty-second
23rd	twenty-third
24th	twenty-fourth
25th	twenty-five

 

NÚMEROS ORDINALES
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