五年级下册第四单元序数词汇总2015.05基数词序数词缩写基数词序数词缩写基数词序数词缩写onefirst 1steleveneleventh11thtwenty-onetwenty-first21sttwosecond 2ndtwelvetwelfth12thtwenty-twotwenty-second22ndthreethird3rdthirteenthirteenth13ththirtythirtieth30thfourfourth 4thfourteenfourteenth14thfortyfortieth40thfivefifth 5thfifteenfifteenth15thfiftyfiftieth50thsixsixth6thsixteensixteenth16thsixtysixtieth60thsevenseventh7thseventeenseventeenth17thseventyseventieth70theighteighth8theighteeneighteenth18theightyeightieth80thnineninth9thnineteennineteenth19thninetyninetieth90thtententh10thtwentytwentieth20th五年级下册第四单元序数词汇总2015.05基数词序数词缩写基数词序数词缩写基数词序数词缩写onefirst 1steleveneleventh11thtwenty-onetwenty-first21sttwosecond 2ndtwelvetwelfth12thtwenty-twotwenty-second22ndthreethird3rdthirteenthirteenth13ththirtythirtieth30thfourfourth 4thfourteenfourteenth14thfortyfortieth40thfivefifth 5thfifteenfifteenth15thfiftyfiftieth50thsixsixth6thsixteensixteenth16thsixtysixtieth60thsevenseventh7thseventeenseventeenth17thseventyseventieth70theighteighth8theighteeneighteenth18theightyeightieth80thnineninth9thnineteennineteenth19thninetyninetieth90thtententh10thtwentytwentieth20th