以内数的顺数和倒数王思斯.ppt
学习20以内数的顺数和倒数,执教人：王思斯,1,2,3,4,5,6,7,8,9,10,米奇和米妮怎样才能在一起呢？1.米妮上楼梯。2.米奇下楼梯。,10,9,8,7,6,5,4,3,2,1,10,9,8,7,6,5,4,3,2,1,20,18,17,15,13,10,16,19,14,12,11,9,20,19,16,14,18,17,15,20,19,18,17,16,15,14,13,17,16,19,14,12,9,20,18,15,13,11,10,17,16,19,14,12,9,20,18,15,13,11,10,
