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初学分数的小学生,在计算中常常会出现各种各样的错误。认真分析、研究学生在分数计算中的错误,对我们今后的教学是很有裨益的。 一、对教材中的重点难点掌握不好产生的错误。 有的学生这样做异分母分数的加减:3/5+4/7=7/12 7/10-1/3=6/7或这样做同分母分数的加减:1/2+1/2=2/4错误原因是这些学生设有理解分数的意义。教师在一开始讲解分数概念时,一定要再三强调分数单位相同是同分母分数加减法的根据;异分母分数必须先通分再加减。只有学生切实理解了这些概念,才能正确运用。
Primary school students who begin the grade, often in the calculation of a variety of errors. A careful analysis and study of students' mistakes in the calculation of scores are very helpful to our future teaching. First, the teaching materials difficult to grasp the key to the error. Some students do the addition and subtraction of different denominator scores: 3/5 + 4/7 = 7/12 7/10 - 1/3 = 6/7 or do the same with the denominator fraction addition / subtraction: 1/2 + 1 / 2 = 2/4 The reason for the error is that these students have the meaning of understanding the score. Teachers at the beginning to explain the concept of points, we must repeatedly emphasize the same unit of the same denominator of the addition and subtraction of the basis of the law; different denominator points must pass points and then add and subtract. Only students understand these concepts can be used correctly.