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eighth
tenth
eleventh
twelfth
ninth
fifth
4th 5th 6th 7th 8th 9th 10th 11th 12th
13th 14th 15th 16th 17th 18th 19th 20th
30th
one two three four five
six seven eight nine ten eleven twelve
基数词
thirteen fourteen fifteen sixteen seventeen eighteen nineteen twenty twenty-one twenty-two twenty-three
thirty
基数词
first second third fourth fifth sixth seventh eighth ninth tenth eleventh twelfth
序数词
thirteenth fourteenth fifteenth sixteenth seventeenth eighteenth nineteenth twentieth twenty-first twenty-second twenty-
third thirtieth
序数词
1st
2nd
3rd
21st
22nd
23rd
Read these numbers and find out the rules:
基数词变序数词有规律吗？
合作探究
请将基数词转换成序数词