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学生在解答应用题的过程中用正确方法进行验算,可以及时发现错误、改正错误(包括数的计算和解答方法),还有助于学生理解应用题中的数量关系,掌握解答应用题的方法,从而发展学生思维能力,使判断变得更有根据和更有把握。有些学生对应用题的验算,往往只是按所列的算式去算。这样去验算的话,在很多情况下只能检查出式子计算得是否正确,而检查不出解题方法是否正确。例如解答这样一道应用题:哥哥植树15棵,哥哥比弟弟多植4棵。弟弟植树多少棵?学生如这样错误列式去计算:15+4=19(棵),不管用加法交换律或用逆运算关系都检查不出它的错误,而要按原题题意、数量关系去检查,才
Students in the process of answering application questions with the correct method of checking, you can find errors, correct mistakes (including the number of calculation and solution methods), but also help students understand the relationship between the number of applications, master the method to answer questions , So as to develop the thinking ability of students so that judgments become more informed and more certain. Some students check the problem, often only according to the formula listed to count. In this case, we can only check whether the formulas are correctly calculated in many cases, and we can not check whether the method for solving problems is correct or not. For example, to answer such an application question: my brother planted 15 trees, brother more than his brother planted 4 trees. The number of students planting trees? Students such as the wrong formula to calculate: 15 +4 = 19 (tree), regardless of the law with the addition or inverse relationship between the operation can not check its mistakes, but according to the original title, quantity Relationship to check, only