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《有理数》一章是初中数学中一切运算的基础.它要求同学们在理解有理数的有关概念、法则的基础上,能根据概念、法则、运算律迅速地进行解题,还要善于根据题目条件,将《有理数》一章重点知识相结合,灵活巧妙地运用概念、法则和简捷的算法提高运算能力,提高思维的敏捷性与灵活性.下面对部分难点内容进行剖析,希望对同学们的学习有所帮助.一、负数的产生及其意义随着社会的发展,小学学过的自然数、分数和小数已不能满足实际需要,为了满
The chapter “Rational Number” is the basis of all arithmetic in junior high school mathematics, which requires students to solve problems quickly according to the concepts, laws and operation laws on the basis of understanding related concepts and laws of rational numbers, , The “rational numbers” a chapter of key knowledge combined with flexible and clever use of concepts, rules and simple algorithms to improve computing power and improve the agility and agility of thinking below some difficult content analysis, I hope the students Learn to help. A negative number and its significance With the development of society, primary school learned natural numbers, fractions and decimals can not meet the actual needs, in order to be full