Los números ordinales se usan en inglés en las fechas (May 12 es May twelfth).
1 st first
2 nd second
3 rd third
4 th fourth
5 th fifth
6 th sixth
7 th seventh
8 th eighth
9 th ninth
10 th Tenth
11 th eleventh
12 th twelfth
13 th thirteenth
14 th fourteenth
15 th fifteenth
16 th sixteenth
17 th seventeenth
18 th eighteenth
19 th nineteenth
20 th twentieth
21 st twenty-first
22 nd twenty-second
23 rd twenty-third
24 th twenty-fourth
25 th twenty-fifth
26 th twenty-sixth
27 th twenty-seventh
28 th twenty-eighth
29 th twenty-ninth
30 th thirtieth
40 th fortieth
50 th fiftieth
60 th sixtieth
70 th seventieth
80 th eightieth
90 th ninetieth
100 th one hundredth
1,000 th one thousandth
1,000,000 th one millionth
Form
Spelling of Ordinal Numbers
Just add th to the cardinal number:
• four - fourth
• eleven - eleventh
Exceptions:
• one - first
• two - second
• three - third
• five - fifth
• eight - eighth
• nine - ninth
• twelve - twelfth
In compound ordinal numbers, note that only the last figure is written as an ordinal number:
• 421st = four hundred and twenty-first
• 5,111th = five thousand, one hundred and eleventh
Figures
When expressed as figures, the last two letters of the written word are added to the ordinal number:
• first = 1st
• second = 2nd
• third = 3rd
• fourth = 4th
• twenty-sixth = 26th
• hundred and first = 101st
Titles
In names for kings and queens, ordinal numbers are written in Roman numbers. In spoken English, the definite article is used before the ordinal number:
• Charles II - Charles the Second
• Edward VI - Edward the Sixth
• Henry VIII - Henry the Eighth