所谓估算,顾名思义就是一种估计的算法。它不借助计算工具,也不需表达计算过程,而直接通过简化的思维过程,灵活运用各种方法,估计出大约的结果。小学生估算能力的培养现已引起世界各国的普遍重视,也 The so-called estimation, as the name suggests is an estimation algorithm. Without resorting to computational tools or expressing computational processes, it approximates the results directly through simplified thought processes and using various methods. The cultivation of primary school students’ estimation ability has now drawn the universal attention of all countries in the world