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一、建模点梳理模型1:两位数乘两位数竖式结构模型。模型2:算理直观模型。模型3:竖式计算方法模型。模型4:乘法分配律渗透模型。模型5:乘法结合律渗透模型。模型6:化归思想渗透模型。二、模型分析模型1:两位数乘两位数竖式结构模型。这个模型主要由三种符号组成,分别是数字、横线、隐藏的运算符号。数字符号又由三部分组成,最上面的是乘法算式,中间是运算过程,下面是运算结果。这个结构决定了两位数乘两位数计算的复杂性。模型2:算理直观模型。两位数乘两位数学习过程中,需要借助直观模
A modeling point combing model 1: two-digit multiplied by two-digit vertical structure model. Model 2: Mathematical intuitionistic model. Model 3: Vertical Calculation Methodology Model. Model 4: Multiplicative distribution law penetration model. Model 5: Multiplication and Law Permeation Model. Model 6: the thought of infiltration model. Second, the model analysis Model 1: two-digit by two-digit vertical structure model. This model is mainly composed of three symbols, namely, numbers, horizontal lines, hidden operator symbol. The digital symbol consists of three parts, the top is the multiplication formula, the middle is the operation process, the following is the operation result. This structure determines the complexity of calculating two digits by two digits. Model 2: Mathematical intuitionistic model. Double-digit by two-digit learning process, you need to use intuitive mode