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估算是学生逻辑思维的凝结与浓缩。掌握科学的估算方法能提高学生的分析、判断能力,帮助学生构建良好的认知结构。因此,教师在教学中,要努力创设和捕捉可利用的课程资源,结合问题情境,加强“四舍五入”法、“去尾”法、“进一”法等不同估算方法的指导,让学生在估算的过程中,掌握科学的方法,将估算意识真正融入到各种学习活动中。
Estimation is the condensation and concentration of students’ logical thinking. Mastering scientific estimation methods can improve students’ ability to analyze and judge, and help students construct a good cognitive structure. Therefore, in teaching, teachers should try their best to create and capture the available curriculum resources, and combine with the situation of the problem, strengthen the methods of “rounding off”, “end to end”, “into” Guidance, so that students in the estimation process, master the scientific method, the true sense of the estimation into a variety of learning activities.