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学习数学的一个重要方面是解题,解题时首先应仔细观察,从题目特点入手寻找规律,选择恰当的方法,这样既简便又准确．对于竞赛题, 尤其要注意发现其特点和规律,采取一定的计算技巧,化繁为简,尽可能减少运算量,从而实现简捷、准确的解题目标．现选取近年来数学竞赛中的典型计算题,分析其特点与解法,供同学们学习参考．
An important aspect of learning mathematics is solving problems. When solving a problem, you should first carefully observe it. Start with the characteristics of the problem to find the law and choose the appropriate method. This is simple and accurate. For competition questions, we must pay special attention to discovering its characteristics and laws, adopting certain computing skills, simplifying the complexity, and reducing the amount of computation as much as possible, so as to achieve a simple and accurate problem-solving goal. The typical calculation questions in the math competition in recent years are selected to analyze the characteristics and solutions for students to learn from.