數的順序,情境導入,探究新知,課堂小結,課后作業,認識100以內的數,課堂練習,3,情境導入,1,10,12,19,23,25,26,28,34,37,43,53,48,58,67,64,73,75,76,78,89,82,100,91,2,3,4,5,6,7,8,9,11,13,14,16,15,17,18,20,22,29,21,24,27