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为了帮助学生克服见“多”就加,见“少”就减的错出,建议在教“求比一个数多(少)几的数”的应用题时,注意培养学生认真审题的习惯,并从直观入手,加强分析数量关系的训练。一、通过实际操作,理解“比一个数多(少)几”的含义在师生准备好教具、学具的前提下,课本第74页的准备题可以分两步来指导学生进行操作:1.第一行摆5根小棒,第二行摆的与第一行同样多,第二行摆几根?2.第一行摆5根小棒,第二行比第一行多摆3根,怎样摆?第二行摆几根?通过实践,明确第二行的根数是由与第一行同样多的5根和比第一行多的3根组成,初步建立了“求比一个数多几的数”的概念。
In order to help students to overcome the “more” plus, see “less” to reduce the wrong, it is recommended to teach “to compare a number of more (less) a few” application questions, pay attention to cultivate the habit of serious exam questions, And start from the intuitive, to strengthen the analysis of the relationship between the number of training. First, through the actual operation, understand the meaning of “more than a few” (less) “In the premise of teachers and students ready teaching aids, learning materials, textbook preparation questions on page 74 can guide students to operate in two steps: 1 . The first row put five small sticks, the second row of the same as the first row, the second row put a few root? 2. The first row put five small sticks, the second row more than the first row 3 Root, how to put the second line put a few? Through practice, it is clear that the second line is composed of as many as the first line and the first line of more than 3, the initial establishment of ” A few more than a few "concept.