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1.重视估算,提高计算的正确率估算对提高学生计算的正确率起着重要作用。一是计算之前,通过估算,能推断出计算结果的大致范围,以提高计算结果的可信度;二是计算之后,可以把估算作为检验手段,对结果进行估算。例如,计算74-8,通过估算能知道其结果是60多,否则,计算有误。同时,估算还有利于提升学生的思维。因为,估算过程是对问题进行观察、分析、思考的过程,也是逻辑思维的过程,从而有利于学生思维能力的发展。加强估算教学是提高小学数学教学的必然趋势。
1. Emphasis on estimation, improve the accuracy of the calculation of estimation to improve the accuracy of the calculation of students plays an important role. First, before the calculation, through the estimation, the approximate range of the calculation result can be deduced to improve the credibility of the calculation result. Second, after the calculation, the estimation can be used as the test means to estimate the result. For example, to calculate 74-8, you can know by estimation that the result is more than 60, otherwise, the calculation is incorrect. At the same time, estimation is also helpful to improve students’ thinking. Because the estimation process is the process of observation, analysis, thinking of the problem, but also the process of logical thinking, which is conducive to the development of students’ thinking ability. Strengthening Estimation Teaching Is an Inevitable Trend of Improving Primary Mathematics Teaching.