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在传统教材中,一直强调精确计算。面对一个问题,学生首先想到的是先列式,再用竖式计算。随着数学与生活的联系日益密切,我们发现,估算教学也是计算教学中不可忽视的一部分。在现行的教材中,也相应安排了一些估算教学内容。笔者根据多年的小学数学教学经验,,结合二年级的《加法估算》一课,谈谈培养小学估算意识的几点看法,以便于同仁们商榷。
In traditional textbooks, the exact calculation has been emphasized. Faced with a problem, students first think of the first type, then the vertical calculation. As the relationship between mathematics and life becomes more and more close, we find that estimation teaching is also an indispensable part of computational teaching. In the current teaching materials, some estimated teaching contents are also arranged accordingly. According to many years of primary school mathematics teaching experience, combined with the second grade “Add Estimation” a lesson, talk about training primary school estimate consciousness of a few opinions, in order to discuss with colleagues.