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估算是一种不需要进行精确计算的口算,它不借助计算工具,而直接通过简化的思维过程,灵活运用各种方法,估计出大约结果,它是计算的重要组成部分。2011版《数学课程标准》强调:“应重视口算,加强估算;能结合具体情况进行估算,并能解释估算的过程;在解决具体问题的过程中,能选择合适的估算方法,养成估算的习惯。”估算能力指个体在利用一些估算策略的基础上,通过观察、比较、判断、推理等认知过程,获得一种概略化结果
Estimation is a kind of calculation that does not need to be accurately calculated. It estimates approximate results directly through a simplified thinking process without any calculation tools, and it is an important part of calculation. 2011 edition of “Mathematics Curriculum Standard” emphasizes: “should pay attention to port count, strengthen the estimate; can be combined with the specific circumstances of the estimate, and can explain the estimation process; in the process of solving specific problems, can choose the appropriate estimation method to develop estimates . ”Estimation ability refers to the individual using a number of estimation strategies based on the observation, comparison, judgment, reasoning and other cognitive processes, to obtain a kind of summary results