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《数学课程标准》指出:“估算在日常生活与数学学习中有着十分广泛的应用,培养学生的估算意识,发展学生的估算能力,让学生拥有良好的数感,具有重要的价值。”数学教材在每一个学段都安排了一定的估算教学内容,然而在实际教学中,种种教学现状却不容乐观:教师、学生的估算意识不强;估算策略单一,只重视结果;教学评价方式乏味……那么,如何改变估算教学的现状,让学生发自内心地喜欢估算呢?一、转变观念,重视估算教学学生估算习惯的培养与能力的提高,很大程度上取决于教师估
The standard of mathematics curriculum states: “Estimation has a very wide range of applications in daily life and mathematics learning. It is of great value to develop students ’estimation awareness, develop students’ estimation ability and give students a good sense of number.” " However, in the actual teaching, the current situation of various kinds of teaching is not optimistic: the sense of estimation of teachers and students is not strong; the strategy of estimation is single and the result is only emphasized; the evaluation of teaching is boring ... So, how to change the current situation of the evaluation of teaching, so that students from the heart like to estimate it? First, change the concept, emphasis on assessment of teaching students to estimate habits of training and ability to improve, to a large extent depends on the assessment of teachers