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“求比一个数多(少)几的数的应用题”有两种类型:一种是正叙的;一种是反叙的。虽然小学二年级学生已经学习过解答常见的加减应用题,但在解答反叙的“求比一个数多(少)几的数的应用题”时,往往把它同正叙的“求比一个数多(少)几的数的应用题”相混淆,机械地见到“多几”就用加法,见到“少几”就用减法。为了防止学生如此错误地理解和计算,提高学生的审题能力,正确解答“求比一个数多(少)几的数的应用题”,我在教学中采用以下教学方法,收到了良好的效果。
“There are two types of applications for comparing numbers that have more or less than a few numbers: one is orthographic and the other is anti-narrative. Although sophomores in primary schools have learned to answer commonly used questions about adding and subtracting questions, when answering the question of ”seeking answers to numbers that are more or less than a few, A few more (less) the number of applications “confused, mechanically see” a few more “to use addition, to see” a few “to use subtraction. In order to prevent students from mistakenly understanding and calculating so as to improve students' abilities of examining questions and answering the question ”How to find a few more or less than one", I used the following teaching methods in teaching and received good results.