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一、分类思想1.第1单元负数,运用分类思想把数分为三类:正数、0、负数。2.第6单元整理和复习,引导学生运用分类思想对学过的数进行分类。第73页第1题,应引导学生深入思考分数与小数的区别和联系,在学习小数的意义时,由于把小数看作分母是10、100、1000、……的分数,这样引入,学生容易理解,但是也有不利的方面。因为与分母是10、100、1000、……的分数等价的小数只是有限小数,是小数的一部分;小数还有无限循环小数,这些小数与分母不是10、100、1000、……的分数等价;即分数与有限小
First, the classification of ideas 1. The first unit of negative numbers, the use of classification ideas into the number of divided into three categories: positive, 0, negative. 2. The sixth unit finishing and review, guide students to use the classification of ideas to classify the number learned. On page 73, question 1, students should be guided to think deeply about the differences and connections between fractions and decimals. When studying the meaning of fractions, it is easy for students to introduce them by taking the fraction as the fractional denominator of 10, 100, 1000, ... Understand, but there are downsides. Because the fractional equivalent to the fractional denominator of 10, 100, 1000, ... is only a fractional decimal and is part of the fractional number; there are infinitely recurring fractional numbers that are not fractions of 10, 100, 1000, ... with the denominator Price; that is, scores and limited small