有理数的计算题在大大小小的考试中都占有很重要的地位,而有理数的题目又变化多样,可以说是形形色色,怎样解决这类题目呢?当然,灵活运用有理数的运算法则、运算律,适当地添加或去括号改变运算顺序,常可达到简化运算的效果·而凑整、分组、拆项、相消、分解相约、整体处理等是有理数运算常用的方法与技巧· The calculation of rational numbers plays an important role in both large and small examinations. The number of rational numbers is also varied and varied. It can be said that all sorts of problems are solved. Of course, the algorithm and arithmetic of rational numbers are used flexibly. Appropriate addition or removal of parentheses to change the order of operations can often achieve the effect of simplifying calculations. Rounding, grouping, deconstructing, destructuring, decomposing, and overall processing are common methods and techniques for rational arithmetic operations.