【最新】5年级数学-逻辑推理.doc

5年级数学-逻辑推理
of rural drinking water sources, protection of drinking water sources in rural areas by the end of tn of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
[分析] 由题目条件可以知道：小李不是教师，小王不是农民，小张不是农民。由此得到左下表。表格中打“√〞表示肯定，打“×〞表示否认。
因为左上表中，任一行、任一列只能有一个“√〞，其余是“×〞，所以小李是农民，于是得到右上表。
　　 因为农民小李比小张年龄小，又小李比教师年龄大，所以小张比教师年龄大，即小张不是教师。因此得到左下表，从而得到右下表，即小张是工人，小李是农民，小王是教师。
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
例题中采用列表法，使得各种关系更明确。为了讲解清楚，例题中画了几个表，实际解题时，不用画这么多表，只在一个表中先后画出各种关系即可。
〔年湖北省“创新杯〞初赛〕六年级四个班进行数学竞赛，小明猜测比赛的结果是：班第一名，班第二名，班第三名，班第四名。小华猜测比赛的结果是：班第一名，班第二名，班第三名，班第四名。结果只有小华猜到的班为第二名是正确的。那么这次竞赛的名次是__________班第一名，__________班第二名，__________班第三名，__________班第四名。
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water