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估算是计算能力的重要组成部分,是人们在日常生活、工作和实际生产中,对一些无法或没有必要进行精确计算的数量,进行近似或粗略的估计的一种方法。随着计算工具的飞速发展,大数目计算内容及要求在调整,但对估算的要求却又提到比较重要的位置,估算的作用也日趋重要。一、估算能对计算结果进行预测或检验估算可以与笔算互相支撑、相互验证,学生在计算之前,可利用估算方法来判断计算结果大概范围,或在计算之后利用估算方法来判断计算结果的合理性,以此来检验笔算结果的正确性。
Estimation is an important part of the calculation ability and a method of approximating or roughly estimating the quantity that some people can not accurately or accurately calculate in daily life, work and actual production. With the rapid development of computing tools, a large number of calculation contents and requirements are being adjusted. However, the estimation requirements are mentioned more importantly and the role of estimation is becoming more and more important. First, the estimation can predict or test the calculation of the results can be mutually supportive and mutual support, mutual verification, students before the calculation, the estimated method can be used to determine the approximate range of the results, or after the calculation method to determine the calculation results to be reasonable In order to test the correctness of the result of the calculation.