1到100的英语单词（序数词，简写形式）

first(1st)Second (2nd) Third (3rd),4th,fifth,6th,7th,eighth,ninth,11th,twelfth----19th,twentieth,twenty-first,以后的类推，也可以在数字的后面加th.注意特殊的就行了．其它的根据规则．