30的英文怎么读？1、数字1-10
基数词：one two three four five six seven eight nine ten
序数词：first second third fourth fifth sixth seventh eighth ninth tenth
2、数字11-20
基数词：eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen
nineteen twenty
序数词：eleventh twelfth thirteenth fourteenth fifteenth sixteenth seventeenth
eighteenth nineteenth twentieth
3、数字21-30
基数词：21 twenty-one 22 twenty-two 以此类推 30 thirty
序数词：基数词+序数词 21 twenty-first 22 twenty-second以此类推 30 thirtieth
4、数字20 30 40…90
基数词：twenty 20 thirty 30 forty 40 fifty 50 sixty 60 seventy 70 eighty 80 ninety 90
序数词：变y为i加eth twentieth thirtieth fortieth fiftieth sixtieth seventieth
eightieth ninetieth
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