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在2011年重新修订和完善的数学课程标准中鲜明的指出:在小学数学教学活动中,教师应让学生选择恰当的估算方法进行一些简单的估算活动,让他们体会到估算在生活中的广泛运用,体会到估算的作用。这就需要我们教师在平时的教学中结合具体的教学内容来创设情境让学生学习估算的策略,使他们深刻感悟估算对一些具体的复杂的问题解决的有效价值和实际意义。所以,在平时的数学课堂上,我们一定要重视结合具体的教学内容进行估算教学,通过恰当的教
In the revised and improved math curriculum standard in 2011, it is clearly pointed out that in primary mathematics teaching activities, teachers should let students choose appropriate estimation methods to conduct some simple estimation activities so as to make them realize that they are widely used in life , Experience the role of estimation. This requires our teachers in the usual teaching combined with specific teaching content to create situations for students to learn estimation strategies, so that they deeply appreciate the estimation of some of the specific complex problem solving effective and practical significance. Therefore, in the usual mathematics class, we must attach importance to the combination of specific teaching content estimation teaching, through the proper teaching