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根据生活经验和物理基础知识,将相关数据取整、适当扩大或减小,然后通过计算求出相关量的近似值,达到快速解题的方法称为估算法.估算型题目考查的是学生对生产生活实际的认知能力以及估测或估算能力.其特点是:由题意中给出的条件不足以直接计算出需求的结果,只有通过仔细推敲及对物理知识的透彻理解,结合生产生活实际,才能得出正确答案.这类题目在目前的中考中是常见的一种题型,综合性很强,能充分考查学生对物理知识的掌握程度.下面对常见的估算题型进行小结,供参考.
According to life experience and basic knowledge of physics, the relevant data is rounded up, appropriately enlarged or reduced, and then the approximate value of the relevant volume is calculated by calculation, and the method for achieving rapid problem solving is called estimation method. The estimated type of problem is the student’s production. The actual cognitive ability of life and its ability to estimate or estimate. It is characterized by the fact that the conditions given in the question are not sufficient to directly calculate the result of the demand. Only through careful consideration and thorough understanding of physical knowledge can the actual life of production be combined. , In order to get the correct answer, this type of subject is a common type of question in the current middle school entrance exam, and it is comprehensive enough to fully examine students’ mastery of physics knowledge. Here is a summary of the common estimation questions. for reference.