在四则混合运算中,要想正确而快速地计算出结果,除了要掌握正确的运算顺序外,还要善于发现算式中数与数之间的关系,合理运用简便算法。如何提高四则混合运算的正确率呢,我们用三个例子分别来诊断和分析一些问题,希望大家能引以为戒,对运算错误防患于未然。 In four mixed computing, in order to correctly and quickly calculate the results, in addition to master the correct sequence of operations, but also be good at finding the relationship between the number and the number of the formula, the rational use of simple algorithms. How to improve the accuracy of the four hybrid operations? We use three examples to diagnose and analyze some problems respectively. We hope everyone can take precautionary measures and prevent operational errors from occurring in the first place.