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在进行有理数的运算过程中,如能根据题目的特点,合理运用运算律,采用符合情理而又能简化解题过程的方法,就会大大提高解题速度．
In the calculation process of rational numbers, if we can reasonably use the operation law according to the characteristics of the topic and adopt a method that conforms to reason and simplifies the problem-solving process, it will greatly increase the speed of problem solving.