题目:某少儿图书馆采购新书180本,其中有科普书和文艺书两种,已知科普书的2/5比文艺书的1/4多7本。两种书各多少本?(云南省威信县旧城镇1994年小学数学毕业试题) 分析:解此题时,可以从不同的角度去分析题目的数量关系,根据不同的解题思路,殊途同归求得问题的解答,从而达到训练学生思维之目的。一、图示法 Subject: A children's library purchases 180 new books, of which two are popular books and literary books, two fifths of which are known to be more than one-fourth of seven books of literary books. Analysis of the problem of the elementary school maths graduation in the old town of Weixin County, Yunnan Province in 1994): When analyzing this question, we can analyze the quantitative relationship of the questions from different perspectives, and according to different problem-solving ideas, Answer the question, so as to achieve the purpose of training students thinking. First, the graphic method