北师数学二上第八单元《做个乘法表》课件.ppt

,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,做个乘法表,二年级上册 第八单元,6,9,的乘法口诀,1,找出乘数中有,3,的乘法算式，,并完成下表。,3,6,3,3,9,4,3,12,5,3,15,6,3,18,7,3,21,8,3,24,9,3,27,2,找出积是,18,的乘法算式，并填一填。,9,2,2,9,6,3,3,6,3,21,53,93,12,13,14,15,16,17,18,19,23,25,26,28,29,31,32,33,34,36,37,38,41,42,43,44,45,47,49,59,64,65,66,67,68,73,74,75,76,88,51,52,54,56,82,83,84,85,86,61,62,71,78,79,57,87,91,92,95,96,98,99,下面是淘气做的乘法表，你能帮他填完整吗？,4,53,93,12,13,14,15,16,17,18,19,21,23,25,26,28,29,31,32,33,34,36,37,38,41,42,43,44,45,47,49,59,64,65,66,67,68,73,74,75,76,88,51,52,54,56,82,83,84,85,86,61,62,71,78,79,57,87,91,92,95,96,98,99,观察下表，你能发现什么？与同伴说一说。,5,三七,五九,七九,七八,四六,六六,五七,八八,1.,把乘法口诀填完整。,二十一,二十四,四十五,三十六,六十三,三十五,五十六,六十四,6,2.,从,“,18,，,27,，,3,，,9,，,6,”,中选出几个合适的数，组成两道,乘法算式和两道除法算式。,6,3,3,6,18,18,3,18,6,18,6,3,9,3,3,9,27,27,3,27,9,27,9,3,7,3.,座位够吗？,58=40,（人）或,85=40,（人），,因为,3840,，所以座位够。,8,4.,做一个转盘，转一转，算一算。,9,5.,想一想，算一算。,7,6,10,你学到了什么？,11,