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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,*,5的乘法口诀,复习导入:,口算,:,1,3,2,2,4,3,3,2,=3,=4,=12,=6,一三得三,二二得四,三四十二,二三得六,船的只数,1,2,3,4,5,人数,5,10,看图数一数,填一填,情境导入:,船的只数,1,2,3,4,5,人数,5,10,15,看图数一数,填一填,船的只数,1,2,3,4,5,人数,5,10,15,20,看图数一数,填一填,船的只数,1,2,3,4,5,人数,5,10,15,20,25,看图数一数,填一填,船的只数,1,2,3,4,5,人数,5,10,15,20,25,1只船:,1,个,5,1,5=5,一五得五,三五十五,四五二十,3,5=,1,5,五五二十五,3只船:,3,个,5,5,5=,2,5,5只船:,5,个,5,4,5=,20,4只船:,4,个,5,二五一十,2,5=,10,2只船:,2,个,5,猜,一,猜,两棵小树十个叉,,不长叶子不开花。,能写会算还会画,,天天干活不说话。,谜底:,5,的乘法口诀,小手图形,乘法算式,乘法口诀,5,1,=,5,15=5,5,2,=1,0,25=10,5,3,=1,5,35=15,5,4,=2,0,45=20,5,5,=2,5,一五,得,五,二五,一十,三五,十五,四五,二十,五五,二十五,利用口诀进行计算:,5,1,2,3,4,5,( ),( ),( ),( ),( ),5,10,15,20,25,25,10,5,20,15,这是谁家的信,55,25,45,15,35,54,52,51,53,5,3=15,3,3,3,3,3,5,4=20,4,4,4,4,4,2.,填空。,( )个( ),加法算式:,( ),乘法算式:( ),读作:,( ),4 5,5+5+5+5=20,45=20,或,54=20,4,乘,5,等于,20,或,5,乘,4,等于,20,
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