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一、问题缘起——简单问题,为何如此困难下面是苏教版小学数学五年级上册附录中的练习题:下面是某校传达室各个班级信箱的示意图:(1)说说各年级2班信箱的位置,并用数对表示。(2)如果学校传达室把寄给王洁的信件放在了(△,4)的信箱里,王洁是几年级的学生?(3)如果(4,○)表示某班级信箱的位置,可能是哪个班?学生在独立完成第(2)(3)两题时,明显遇到了困难,从与学生的交谈中了解到一部分学生对数对(△,4)中△的含义不明确;还
First, the problem origins - a simple question, why so difficult The following is the Supian version of elementary school mathematics grade five appendix appendix exercises: The following is a school transfer room schematic diagram of each class mailbox: (1) talk about the grade 2 mailboxes The location, and expressed in pairs. (3) If (4, ○) indicates the location of a class mailbox, (2) if Wang Jie is a student of grade 3 if the school’s delivery room places the mail addressed to Wang Jie in the mailbox of (△, 4) What class may be? Students have obviously encountered difficulties in independently solving the questions (2) and (3). From the conversation with the students, it is not clear what part of the logarithm pairs in △ (△, 4) means; also