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【教学目标】知识与技能:掌握有理数的乘法法则,会用乘法法则解决两个有理数相乘的问题。过程与方法:通过类比小学两个正数相乘的情形,经历观察、猜想、归纳总结的方法得出有理数乘法法则,在此过程中让学生体会用已有知识解决未知问题的乐趣。情感态度与价值观:让学生在知识的行程过程中感受数学的魅力,在游戏中学,体会数学带给我们的快乐。【教学重点】有理数乘法法则及其运用。【教学难点】用含字母的一般的形式表示有理数乘法法则。
【Teaching Objectives】 Knowledge and Skills: To grasp the law of multiplication of rational numbers, multiplication law will be used to solve the problem of multiplying two rational numbers. Processes and Methods: Through the case of multiplying two positive numbers in the analogy primary school, we get the rule of rational multiplication through the methods of observation, conjecture and induction and summarization. In the process, students can understand the fun of solving the unknown problem with the existing knowledge. Emotional Attitude and Values: Let students experience the charm of mathematics in the process of knowledge. In the middle schools of games, they will experience the happiness brought by mathematics. 【Teaching Points】 rational number multiplication law and its application. Difficulties in teaching the general form of letters that contain rational number multiplication law.