求值问题的题型已不再是单一的常规题型,出现了许多富有新意的创新题型．下面举例说明．一、游戏题例1 (湖南益阳)甲、乙两同学进行数学猜迷游戏：甲说一个数a的相反数就是它本身,乙说一个数b的倒数也等于本身,请你猜一猜|a-b|=____．析解欲求|a-b|,首先应知道a、b之值,由于甲、乙两同学所说的内容隐含着a和b的值,因此易得a+a=0,1/b=b, The question type of the evaluative question is no longer a single regular question type, there are many innovative questions with new ideas. Here is an example. 1. Game Example 1 (Hunan Yiyang) Classmates A and B perform mathematical guessing games: A says that the inverse of a number is itself, and B says that the inverse of a number b is equal to itself. Please guess it. Ab|=____. Analysing desires |a-b|, we should first know the values ​​of a and b. Since the contents of A and B students imply a and b values, it is easy to get a+a=0,1/b=b,