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解答应用题是学习小学数学的重点和难点之一,而孩子们往往都“重”解题,“轻”检验。其实,应用题的解后检验是非常重要的,通过检验不仅可以发现问题、改正错误,提高解题的正确率,还可以加深对问题的理解,培养思想的灵活性,提高学习效率。怎样指导孩子检验应用题呢?下面就向您介绍几种常用的检验方法。一、估算答数有些应用题的数据较大或数量关系较复杂,列式计算有一定难度,但我们根据题目的条件和所求问题,可以粗略地“估”出答数的取值范围,从而判断解题是否有错。例如:李强叔叔开汽车到相距150千米的县城去买化肥。去时每小时行30千米,去时所花的时间比返回时
Solving the practical problem is one of the most important and difficult points in the study of primary school mathematics. However, the children tend to “emphasize” solving problems and “light” tests. In fact, the application of post-test solution is very important, through testing can not only find problems, correct errors and improve the accuracy of the problem-solving, but also can deepen the understanding of the problem, cultivate the flexibility of thinking, improve learning efficiency. How to guide the child to test the application? Here are some commonly used methods to introduce you to the test. First, the estimated number of questions some of the application of the data is larger or the relationship between the number of more complex, column calculation has some difficulties, but according to the conditions of the subject and the question asked, you can roughly “estimate” the scope of the answer number, To determine whether the problem-solving problems. For example: Uncle Li Qiang driving a car to 150 kilometers away from the county to buy fertilizer. When traveling to go 30 kilometers per hour, to spend more time than when returning