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,子页,子页,子页,子页,子页题目,内容：,子页,子页,子页,子页,子页题目,内容：,子页,子页,子页,子页,子页题目,内容：,子页,子页,子页,子页,子页题目,内容：,内容：,子页题目,子页,子页,子页,子页,主页,子页,子页题目,子页,子页,子页,主页,子页,T,H,A,N,K,Y,O,U,单击此处编辑母版标题样式,单击此处编辑母版文本样式,二级,三级,四级,五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,二级,三级,四级,五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,二级,三级,四级,五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,二级,三级,四级,五级,*,*,子页,子页,子页,子页,子页题目,内容：,单击此处编辑母版标题样式,单击此处编辑母版文本样式,二级,三级,四级,五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,二级,三级,四级,五级,*,*,做个乘法表,（建议一课时完成）,第八单元,69,的乘法口诀,BS,二年级上册,课后作业,探索新知,探索乘法的,规律,1,课堂探究点,2,课时流程,课堂小结,当堂检测,探究,点,乘法的意义,找出乘数中有,3,的乘法算式，并完成下表。,9,3,4,5,6,7,8,3,3,3,3,3,3,3,3,6,9,12,15,18,21,24,27,找出积是,18,的乘法算式，并填一填。,2,9,3,6,9,2,6,3,下面是淘气做的乘法表，你能帮他填完整吗？,85,40,12,2,13,3,14,4,15,5,16,6,17,7,18,8,19,9,21,2,23,6,8,25,10,26,12,14,28,16,29,18,31,3,32,6,33,9,34,12,15,36,18,37,21,38,24,27,41,4,42,8,43,12,44,16,45,20,24,47,28,32,49,36,51,5,61,6,71,7,91,9,8,14,18,25,40,54,49,63,72,36,52,10,53,15,54,20,56,30,57,35,59,45,62,12,64,24,65,30,66,36,67,42,68,48,73,21,74,28,75,35,76,42,78,56,79,63,95,45,82,16,83,24,84,32,86,48,87,56,88,64,92,18,93,27,96,54,98,72,99,81,观察上表，你能发现什么？与同伴说一说。,85,40,12,2,13,3,14,4,15,5,16,6,17,7,18,8,19,9,21,2,23,6,8,25,10,26,12,14,28,16,29,18,31,3,32,6,33,9,34,12,15,36,18,37,21,38,24,27,41,4,42,8,43,12,44,16,45,20,24,47,28,32,49,36,51,5,61,6,71,7,91,9,8,14,18,25,40,54,49,63,72,36,52,10,53,15,54,20,56,30,57,35,59,45,62,12,64,24,65,30,66,36,67,42,68,48,73,21,74,28,75,35,76,42,78,56,79,63,95,45,82,16,83,24,84,32,86,48,87,56,88,64,92,18,93,27,96,54,98,72,99,81,小试牛刀,1,完成下面的乘法口诀表（见下页）并回答问题。,(1),圈出,9,的倍数，每相邻的两个数相差,(,),。,(2),观察此表，几与每一横行上的数相乘，积就比前一个积多,(,),。,(3),找出积是,24,的乘法算式。, , ,圈略,9,几,4 6,24,6 4,24,3 8,24,8 3,24,1,2,3,4,5,6,7,8,9,1,21,2,2,3,33,9,4,5,45,20,6,66,36,7,8,9,11,1,31,3,41,4,51,5,61,6,71,7,81,8,91,9,12,2,22,4,32,6,42,8,52,10,62,12,72,14,82,16,92,18,13,3,2,3,6,43,12,53,15,63,18,73,21,83,24,93,27,14,4,24,8,34,12,44,16,54,20,64,24,74,28,84,32,94,36,15,5,25,10,35,15,55,25,65,30,75,35,85,40,95,45,16,6,26,12,36,18,46,24,56,30,76,42,86,48,96,54,17,7,27,14,37,21,47,28,57,35,67,42,77,49,87,56,97,63,18,8,28,16,38,24,48,32,58,40,68,48,78,56,88,64,98,72,19,9,29,18,39,27,49,36,59,45,69,54,79,63,89,72,99,81,2,在 里填上“”“”或“”。,92 20,89 70,56 79 66 35,47 37 35 25,76 40 44 18,归纳总结：,乘法口诀表中一共有,81,句口诀，是几的乘法口诀，它的口诀中的积总比上句多几。,夯实基础,（教材,P85,练一练）,二十一,1.,把乘法口诀填完整。,三七,_,五九,_,七九,_,七八,_,四六,_,六六,_,五七,_,八八,_,六十三,四十五,五十六,二十四,三十五,三十六,六十四,2.,从“,18,，,27,，,3,，,9,，,6,”中选出几个数，组成两道乘法算式,和两道除法算式。,3 6 18,6 3 18,18 6 3,18 3 6,点拨：本题答案不唯一。,3.,座位够吗,?,58,40,（,人,）,或,85,40,（,人,）,40,38,答,：,座位够,4.,做一个转盘，转一转，算一算。,略,5.,想一想，算一算。,2,4,8,2,3,6,9,3,7,6,易错辨析,（,3,判断。,(1),每句乘法口诀都可以写,2,道乘法算式。,(,),(2)9,的乘法口诀有九句。,(,),辨析：对乘法口诀表的规律不熟悉。,
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