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【教学目标】1.使学生理解单项式的概念。2.使学生熟练准确地确定一个单项式的系数和次数。3.充分发挥学生的主动性,在自主合作学习中向学生渗透分类讨论的数学思想【教学重难点】重点:理解单项式的概念、系数和次数。难点:单项式系数是负数时,学生常把“-”号漏掉。【教学过程】一、复习提问列代数式:
Teaching Objectives 1. To enable students to understand the concept of monomials. 2. Make students skilled and accurate to determine a single coefficient and the number of times. 3. give full play to the initiative of students, in the independent cooperative learning to students to penetrate the classification of mathematical thinking [teaching heavy and difficult] Focus: to understand the concept of monomials, coefficients and the number of times. Difficulty: Monocular coefficient is negative, the students often miss the “-” sign. Teaching process A review of questions Algebra: