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分数除法法则的推导历来是教学中的难点,难就难在学生对“甲数除以乙数等于甲数乘以乙数的倒数”的算理不容易理解。教师往往只教给学生死板的计算方法,使学生对法则的理解只知其然,而不知其所以然,只会照猫画虎。我在教学这一内容时,采用了多项思维训练,从不同的知识点出发,引导学生理清分数除法的算理,使学生掌握了分数除法法则。
The derivation of the rule of fractional division has always been a difficult point in teaching, and it is difficult for students to understand the arithmetic of “dividing the number of a by the number of a by the number of a by the number of a by the number of b.” Teachers tend to teach students only rigid calculation methods, so that students understand the law only know, but I do not know why, only cats and tigers. When teaching this content, I used a number of thinking trainings. Starting from different points of view, I guided students to sort out the arithmetic of fractional division and made the students grasp the rules of fractional division.