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在人民教育出版社《义务教育课程标准实验教科书(数学)》中,配方法的教学内容被安排在九年级(上册).其实,配方法在八年级(上册)中已早有渗透.纵观初中数学教材,对配方法的教学大致可以分为以下几个阶段.一、初步阶段配方法的关键是逆用二项式完全平方公式,通过“补”项,配成a~2+2ab+b~2的形式.在八年级(上册)《第十四章整式的乘除与因式分解》,讲《14.2乘法公式》时,可进行配方的初步训练.如
In People’s Education Press, “Compulsory Education Curriculum Standard Experimental Textbook (Mathematics)”, with the method of teaching content is arranged in the ninth grade (the first volume) .In fact, the method of allocation in the eighth grade (volume) has long been infiltrated. Junior high school mathematics textbooks, with the method of teaching can be divided into the following stages: First, the initial stage of the method with the key is inverse square equation of the binomial, through the “fill” item, dubbed a ~ 2 + 2ab + b ~ 2. In the eighth grade (the first volume) “Chapter fourteenth integral multiplication and division and factorization,” say “14.2 multiplication formula”, the formula can be the initial training, such as