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【教学内容】苏教版小学数学五年级上册第99、100页。【教学目标】1.经历用字母表示数的过程,初步理解含有字母的式子表示的意义,会根据字母取值口头求简单的代数式的值。2.初步熟悉代数式的简写。3.体会数学的抽象性与概括性,感受数学的简洁美和符号化思想。【教学重、难点】体会用字母表示数的价值,理解含有字母的式子所表示的意义。【教学过程】一、唤醒旧知,孕伏铺垫谈话:同学们,在以前的数学学习过程中我们和字
【Teaching content】 Sujiao primary school mathematics grade five, the first 99,100 pages. 【Teaching Objectives】 1. Experience the process of using the number of letters, a preliminary understanding of the meaning of the formula that contains letters, will be based on the letter orally to seek a simple algebraic value. 2. Preliminary familiar with algebraic shorthand. 3. Experience the abstraction and generality of mathematics, feel the simplicity of mathematics and symbolic thinking. [Teaching heavy, difficult] Experience the value of the number of letters, understand the meaning of the formula with letters. [Teaching process] First, awaken the old knowledge, pregnant volition bedding conversation: Students, in the past, we learn mathematics and the word