专题五 数词1one13thirteen20twenty100onehundred2two14fourteen30thirty1,000onethousand3three15fifteen40forty1000及以上的数字，从后面向前，每三位加“，”，第一个“，”前为thousand，第二个“，”前为million，第三个“，”前为billion4four16sixteen50fifty5five17seventeen60sixty6six18eighteen70seventy7seven19nineteen80eighty8eight这7个词都以­teen结尾90ninety9nine这8个词都以­ty结尾10ten11eleven12twelve第一到第十第十一到第十九第二十及以上firsteleventhtwentiethsecondtwelfththirtieththirdthirteenthfortiethfourthfourteenthfiftiethfifthfifteenthsixtiethsixthsixteenthseventiethseventhseventeentheightietheightheighteenthninetiethninthnineteenthhundredthtenththousandth知识检测知识检测9 数 词(训练时间：40分钟 分值：100分)