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第六节数词1、基数词：表示数目多少。1one11eleven21twenty-one2two12twelve22twenty-two3three13thirteen30thirty4four14fourteen40forty5five15fifteen50fifty6six16sixteen60sixty7seven17seventeen70seventy8eight18eighteen80eighty9nine19nineteen90ninety10ten20twenty100hundred注意：数字“0”可以读作“zero”，也可以读作字母“o”。2、序数词：表示顺序先后。1stfirst11theleventh21sttwenty-first2ndsecond12thtwelfth22ndtwenty-second3rdthird13ththirteenth30ththirtieth4thfourth14thfourteenth40thfortieth5thfifth15thfifteenth50thfiftieth6thsixth16thsixteenth60thsixtieth7thseventh17thseventeenth70thseventieth8theighth18theighteenth80theightieth9thninth19thnineteenth90thninetieth10thtenth20thtwentieth100thhundredth基数词变序数词记忆口诀：一、二、三，需要记，八去t，九省e，ve结尾时，f来代替，ty结尾时，y变ie，再加th，若是几十几，前基后序别忘记。