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统编教材第九册繁分数一节,虽然篇幅短,但它是小学计算内容的一个重点,学生学习中的一个难点,也是初中学生学习繁分式、分式的化简以及有关计算的基础。怎样才能使学生正确地理解繁分数的概念,掌握繁分数的化简方法和规律,为今后的学习打下扎实的基础呢?我在教学时注意了如下几点:一、运用新旧知识的内在联系,让学生通过计算、观察、比较,形成知识的正迁移,加深学生对繁分数概念的认识。在繁分数概念的引出时,教师先让学生把下列除法改写成分数的形式:
Although the length of the text is short, it is a key point in the calculation of primary school. One of the difficulties in student learning is also the difficulty of junior high school students in learning the multiplication and fractional reduction and the related calculation basis. How to enable students to correctly understand the concept of multiplication, to master the simplification of the number of methods and laws of reduction for the future lay a solid foundation for learning? In teaching I noticed the following points: First, the use of new and old knowledge of the intrinsic link , So that students through the calculation, observation, comparison, the formation of the positive transfer of knowledge, to deepen the students understanding of the concept of complex numbers. In the introduction of the concept of multiplicity, teachers first ask students to rewrite the following divisions into the form of fractions: