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近年来,有些教师为了引导学生认真阅读课本,准确掌握数学概念的确切含义,常编选一些“是非题”让学生练习,收到了较好的效果。是非题有不少优点。首先,编拟简便,针对性强。各年级数学老师都可以针对学生平时作业中带普遍性的错误,编出是非题。例如,不少学生只记住了园的半径都相等,而忽略了同园或等园这个前提。老师就编出这样一道是非题:园的半径都相等,直径也都相等( )。又如三年级同学在学四则混合运算顺序时,老师虽反复强调了“先乘除后加减”的原则,但部份同学往往误认为乘除在一起也应该“先乘后除”。老师便编出这样的是非题:在只有加减没有括号
In recent years, in order to guide students to carefully read textbooks and accurately grasp the exact meaning of mathematical concepts, some teachers often make some “non-problematic” exercises for students to practice and receive good results. Non-question has many advantages. First, the preparation of simple, targeted. Mathematics teachers of all grades can be aimed at students in their usual homework with the mistakes made by the non-question. For example, many students only remember that the radius of the park is equal, while neglecting the same premise as the park or the park. The teacher wrote the following on the non-question: The parks have the same radius and the same diameter (). Another example is the third grade students learn four mixed operation sequence, although the teacher repeatedly emphasized the “multiply and divide by addition and subtraction” principle, but some students often mistakenly believe that the multiplication and division should also be “first by the latter.” The teacher has compiled such a non-question: only in addition and subtraction without parentheses