Aula 5 - Cardinal Numbers (101-1000); Ordinal Numbers (1st-20th)

1. Cardinal Numbers (101-1000)

100 - One Hundred
200 - Two Hundred
300 - Three Hundred
400 - Four Hundred
500 - Five Hundred
600 - Six Hundred
700 - Seven Hundred
800 - Eight Hundred
900 - Nine Hundred
1000 - One Thousand

If we have to say a number, for example 403, we:

*say FOUR HUNDRED THREE, because 400 (four hundred) + 3 (three)

201 - two hundred one (because 200 [two hundred] + 1 [one])
319 - three hundred nineteen (because 300 [three hundred] + 19 [nineteen])
928 - nine hundred twenty eight (because 900 [nine hundred] + 28 [twenty eight])
etc.....



2. Ordinal Numbers (1st - 20th)

This is used to give order, or position of something.

First - 1st (the 2 lasts letters come to the number, always in all number)
Second - 2nd
Third - 3rd
Fourth - 4th
Fifth - 5th
Sixth - 6th
Seventh - 7th
Eighth - 8th
Ninth - 9th
Tenth - 10th
Eleventh - 11th
Twelfth - 12th
Thirtheenth - 13th
Fourteenth - 14th
Fifteenth - 15th
Sixteenth - 16th
Seventeenth - 17th
Eighteenth - 18th
Nineteenth - 19th
Twentieth - 20th

Observe that the basis of the name (ex: fourteenth) is the same as the cardinal numbers (fourteen), adding sometimes ''th''. But, be careful: some numbers have to be modified.
Ex: Twentieth - the original is TWENTY.
       twenty - twentieth
Ex: Twelfth - the original is TWELVE
       twelve - twelfth

The sound of ''th'' is almost the same as /ff/. Ex: ninth: //nainff//