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教学内容:北师大版四年级下册教学目标:1.在具体情境中理解用字母表示数的意义,初步掌握用字母表示数的方法,会用含有字母的式子表示数量,并掌握含有字母的乘法算式的书写规则。2.在探索用字母表示数的过程中,建立字母式子的模型,充分体会用字母表示数的方法、作用和优越性。3.在学习中逐步感受符号化思想,发展抽象概括能力。
Teaching content: Beijing Normal University version of the fourth grade Volume Teaching objectives: 1. Understanding of the specific situation in the use of the number of letters to understand the significance of the initial mastery of the number of alphanumeric expressions, Letter multiplication formula of writing rules. 2. In the process of exploring the number of alphanumeric characters, a model of alphabetical subtype is established, and the method, function and superiority of expressing the number in alphabetical order are fully realized. 3. Gradually feel symbolic thinking in learning and develop abstract abilities.