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,8,的,乘法口诀,8的乘法口诀,1,复习巩固,口算下面各题,并说说用的什么口诀。,46,24,四六二十四,55,25,五五二十五,67,42,六七四十二,27,14,二七十四,45,20,四五二十,63,18,三六十八,复习巩固口算下面各题,并说说用的什么口诀。4624四六二,2,新知讲解,3,摆一个大正方体用了几个 小正方体?,8,新知讲解3摆一个大正方体用了几个 小正方体?8,3,新知讲解,3,16,的个数,1,2,3,4,5,6,7,8,的个数,8,16,24,32,40,48,56,64,绿色圃小学教育网,http:/www.L,绿色圃中学资源网,http:/cz.L,新知讲解316 的个数12345678 的个数81624,4,新知讲解,3,的个数,1,2,3,4,5,6,7,8,的个数,8,16,24,32,40,48,56,64,你能编出,8,的乘法口诀吗?,新知讲解3 的个数12345678 的个数8162432,5,新知讲解,一八得八,二八十六,三八二十四,3,的个数,1,2,3,4,5,6,7,8,的个数,8,16,24,32,40,48,56,64,四八三十二,五八四十,六八四十八,七八五十六,八八六十四,新知讲解一八得八二八十六三八二十四3 的个数1234567,6,新知讲解,六八四十八,3,你根据口诀想到几个乘法算式?,6,8,48,8,6,48,新知讲解六八四十八3你根据口诀想到几个乘法算式?68,7,新知讲解,3,38,你能想到哪句口诀?,三八二十四,24,新知讲解338你能想到哪句口诀?三八二十四24,8,新知讲解,3,58,40,88,64,五八四十,八八六十四,新知讲解358408864五八四十八八六十四,9,想想做做,1,、,48,8,40,58,8,48,68,8,56,58,40,85,40,68,48,86,48,78,56,87,56,想想做做1、488405884868856,10,想想做做,2,、,7,个,8,比,6,个,8,多( ),,比,8,个,8,少( )。,8,8,3,个,8,比,4,个,8,少( ),,比,2,个,8,多( )。,8,8,想想做做2、7个8比6个8多( ),883个8比4个,11,想想做做,3,、,想想做做3、,12,想想做做,4,、,82,16,48,32,86,48,87,56,88,64,28,16,84,32,83,24,18,8,58,40,78,56,68,48,想想做做4、8216483286488756,13,想想做做,5,、,38,4,28,85,2,42,88,6,70,想想做做5、384288524288670,14,想想做做,6,、,( ),3,8,24,个,想想做做6、( )3824个,15,想想做做,7,、,( ),8,56,7,( ),6,48,8,8,( ),40,5,想想做做7、( )8567(,16,