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1、晋城市实验小学:彭建红,有序,不遗漏,鸡(只),兔(只),1,8,2,7,3,6,4,5,5,4,6,3,7,2,8,1,列表法,鸡兔同笼共9只,鸡兔各几只?,有序,不遗漏,鸡(只),兔(只),1,8,2,7,3,6,4,5,5,4,6,3,7,2,8,1,列表法,鸡兔同笼,有9个头,26条腿,问鸡和兔各有几只?,鸡(只),兔(只),1,8,2,7,3,6,4,5,5,4,6,3,7,2,8,1,鸡兔同笼,有9个头,26条腿,问鸡和兔各有几只?,腿(条),鸡(只),兔(只),1,8,2,7,3,6,4,5,5,4,腿(条),验证,12+84=,2,32,34,22+74=,32+64=,32,
2、4,28,6,24,30,28,26,减少一只鸡,增加1只兔,腿会减少2条。,减少1只兔,腿会减少4条。,增加一只鸡,腿会增加2条。,所以腿会减少2条。,鸡兔同笼,有9个头,26条腿,问鸡和兔各有几只?,16,4,82+14=,1,8,20,2,7,鸡兔同笼,有9个头,26条腿,问鸡和兔各有几只?,16,4,82+14=,1,8,20,2,7,72+24=,鸡兔同笼,有9个头,26条腿,问鸡和兔各有几只?,22,14,8,3,6,62+34=,12,12,24,4,5,52+44=,10,16,26,减少一只鸡,增加1只兔,腿的总数会增加2条。,减少1只鸡,腿会减少2条。,增加1只兔,腿会增加4条。,所以总腿数会增加2条。,16,4,82+14=,1,8,20,2,7,22,3,6,24,4,5,26,1,8,2,7,3,6,4,5,5,4,12+84=,2,32,34,32,30,28,26,鸡兔同笼,上有35头,下有94足,问鸡兔各几何?,鸡(只),兔(只),腿(条),验证,乐乐存钱罐里有1角和5角的硬币共27枚,总值5.1元,1角和5角的硬币各有多少枚?,