为了培养学生观察能力,应用物理知识解决实际问题的能力.在中考中常有一种新题型——估算题,这类题往往是题目所给条件不完备,或是解法较灵活,同学们往往感到无从下手,现介绍几种方法供参考. In order to cultivate students’ observation ability and apply physical knowledge to solve practical problems, there is often a new type of question in the middle of the exam - an estimation question. Such questions are often the result of incomplete conditions given by the topic, or the solution is more flexible, and the students often feel that No way to start, now introduce several methods for reference.