二年级数学下册一《除法》4分草莓课件3北师大版.ppt

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分草莓,复习,用竖式计算下面各题。,168,134,113,155,55个草莓平均放在8个盘子里,每个盘子里可以放几个?还剩几个?,558 =,),55,8,6,48,7,6,(盘),应该商几?怎么想?,8和几相乘都不等 于55,想:8( ) 最接近55,87=56, 比55大,商7显然是大 了,改商6。,答:每盘放6盘,还剩 7个。, ,7(个),55个草莓,每7个放1盘,,可以放几盘,还剩几个?,557=,),55,7,7,49,6,7,(盘),应该商几?怎么想?,答:每盘放7盘,还剩 6个。, ,6(个),77=49,比55小。,78=56,比55大。,小结:,计算有余数的除法,可以按以下四步进行:,一商: 除数和几相乘最接近被除数,又比被除数小,商就是几。,二乘: 商和除数相乘。,三减: 要分的总数也就是被除数减去商和除数相乘的积。,四比: 余数要比除数小。,

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