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一、教学目标1.知识与技能.借助数轴理解相反数的概念,会求一个数的相反数,会用相反数的定义进行化简.2.过程与方法.培养学生分类讨论和数形结合的思想,提高观察、归纳与概括的能力.3.情感态度价值观.培养学生严谨的治学态度并初步感受数学文化的教育价值,认识对立统一的规律.二、教学重点、难点1.重点:了解相反数的意义.2.难点:多重符号的化简.
First, the teaching objectives 1 knowledge and skills. With the help of several axes to understand the concept of the opposite number, will seek the opposite of a number, will use the opposite number of definitions to be simplified .2 process and methods. , To improve the ability of observation, induction and generalization.3.Emotional Attitudes and Values To cultivate students rigorous scholarship attitude and initially experience the educational value of mathematics culture and recognize the law of unity of opposites. The opposite of the significance of 2. Difficulties: simplification of multiple symbols.