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一、教学目标引导学生回忆、整理平面图形周长和面积的意义及其计算公式的推导过程,并能熟练地应用公式进行计算。通过知识在生活中的应用,体验数学与生活的密切联系,让学生深刻领悟数学来源于生活又运用于生活。渗透“事物之同是相互联系的”等辩证唯物主义观点,引导学生探索知识间的相互联系,构建知识网络,从而加深对知识的理解,学会整理知识,学会学习方法。采用小组学习的方法,让学生在讨论、交流中参与学习活动,培养学生的合作意识、学习能力。
First, the teaching objectives guide students to recall, organize the perimeter of the graphic and the meaning of the area and the derivation of the calculation formula, and can skillfully use the formula to calculate. Through the application of knowledge in life, experience the close connection between mathematics and life, let students have a deep understanding of mathematics from life to life. Infiltrate the dialectical materialist point of view that “things are connected with each other”, guide students to explore the interrelations between knowledge, and build a knowledge network so as to deepen their understanding of knowledge, learn to organize knowledge and learn methods of learning. Adopt the method of group study, let the students participate in the study activities in the discussion and exchange, cultivate students’ sense of cooperation and learning ability.