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在解答小学数学应用题中运用转化法,能沟通应用题数量关系的内在联系,拓宽解题思路,有利于培养学生思维的深刻性和灵活性。现举例介绍转化法在解应用题时的几种运用。 一、条件形式的转化 条件是解应用题的依据,市的应用题条件与问题之间难以建立直接的联系,通过条件形式的转化、变换来沟通联系,易于发现解题的途径。 例1 有两筐苹果。乙筐苹果的重量是甲筐的4/5,从乙筐取出5斤放入甲筐后,这时乙筐苹果的重量是甲筐的7/11。乙筐原有苹果多少斤? 解:题目中“乙筐苹果的重量是甲筐的4/5,从乙筐取出5斤放入甲筐后,这时乙筐苹果的重量是甲筐的7/11”这些条件,可转化为:乙筐原有苹果的斤数是两筐斤数的4/9,从乙筐取出5斤放入甲筐后,这时乙
Applying the transformation method to solve the elementary mathematics application questions can communicate the internal relations of the quantitative relationship of the applied questions and broaden the thinking of solving the problems so as to cultivate the profoundness and flexibility of the students' thinking. Here is an example to introduce several ways to solve the problem. First, the conditional form of the conversion conditions is the basis for the application of the problem, the city of the problem and application of the problem is difficult to establish a direct link between the conditions of the forms of transformation, transformation to communicate, easy to find ways to solve the problem. Example 1 There are two baskets of apples. B baskets of apples weigh 4/5 of a baskets, 5 pounds from B baskets into the basket, then the weight of baskets of apples is 7/11 baskets. B baskets of the original number of pounds of apples? Solution: The title of “B baskets of apples weight is a basket of 4/5, remove 5 pounds from the basket into the basket, then the weight of basket basket of apples is a basket of 7 / 11 ”These conditions, can be converted into: B baskets of the original number of pounds of apple is two baskets of 4/9 pounds, remove 5 pounds from the basket into the basket, then B