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教学目标:⑴知识与技能(1)通过实例总结出分类加法原理和分步乘法原理;(2)能根据具体问题的特征,准确选择分类计数原理与分步计数原理解决一些简单实际问题.⑵过程与方法(1)经历提炼两个原理的过程,体会两个计数原理的意义;(2)在教学过程中,凸显两个原理发现的原始过程,使学生深刻理解由特殊到一般的归纳推理思维;在解决实际问题时进一步体会将问题进行“分类思考”和“分步”思考的数学方法 .⑶情感、态度、价值观
Teaching objectives: ⑴ knowledge and skills (1) summed up by examples of classification and multiplication principle and step by step multiplication principle; (2) can be based on the characteristics of specific problems, accurate choice of classification and counting principles and counting principle to solve some simple and practical problems. Process and method (1) Experiencing the process of refining two principles and realizing the significance of the two counting principles; (2) Highlighting the original process of discovering two principles during the teaching process to enable students to profoundly understand the special and general inductive reasoning Thinking, and further understand the mathematical method of thinking “problem of classification” and “step by step” in solving practical problems.⑶Emotion, attitude and values