first第一 1st
second第二 2nd
third第三 3rd
fourth第四 4th
fifth第五 5th
sixth第六 6th
seventh第七 7th
eighth第八 8th
ninth第九 9th
tenth第十 10th
eleventh第十一 11th
twelfth第十二 12th
thirteenth第十三 13th
fourteenth第十四 14th
fifteenth第十五 15th
sixteenth第十六 16th
seventeenth第十七 17th
eighteenth第十八 18th
nineteenth第十九 19th
twentieth第二十 20th
twenty-first第二十一 21st
twenty-second第二十二 22nd
twenty-third第二十三 23rd
thirtieth第三十 30th
thirty-first第三十一 31st
fortieth第四十 40th
fiftieth第五十 50th
sixtieth第六十 60th
seventieth第七十 70th
eightieth第八十 80th
ninetieth第九十 90th
(one)hundredth第一百 100th