北师版小学数学二年级上册需要几个轮子课件.ppt

需要几个轮子,hyxxll,hyxxll,hyxxll,做1辆车要3个轮子.,hyxxll,做9辆车需要多少个轮子?,hyxxll,3,6,9,12,15,18,21,24,27,hyxxll,31=3,32=6,33=9,34=12,35=15,36=18,37=21,38=24,39=27,hyxxll,你能编出这些口诀吗？,hyxxll,hyxxll,21,15,小兔子回家,6,18,9,24,hyxxll,hyxxll,小蜗牛找家,16,30,12,hyxxll,9,20,15,27,14,hyxxll,找规律,填一填。,25,30,18,21,hyxxll,51,24,37,65,82,93,连一连,15,42,39,56,28,73,hyxxll,一枝铅笔3角钱,3枝这样的笔多少钱?,3,3,9,（角）,hyxxll,制作：黄静,谢谢,hyxxll,