小学二年级上册数学易错的十道难题
小学二年级数学难题1、将一根绳子垂到井底,井外余15米,绳子对折后垂放到井底,井外余1米,问:这口井有多深?2、一桶油连桶重50千克,卖出油的一半后,连桶重30千克,问原来这桶油有多少千克?3、二年级(2)班有53个同学都订了课外读物,其中订《小作文》的有30人,订《趣味数学》的有35人,问两种读物都订的有多少人?4、二年级(2)班订《小作文》的有30人,订《趣味数学》的有35人,两种读物都订的有12人,问二年级(2)班一共有多少人?5、泉州与德化之间的客车,除起点、终点外,还要停靠4个站,客运公司要为这趟客车准备多少种不同的车票?6、小红和他的5个好朋友打电话,每两人之间打一次电话,一共要打...
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