换元法是一种常用的数学解题方法.通常说的换元法,是把一个未知的代数式子用一个字母来表示,从而使原问题得到简化.但有时需要把问题中的某个确定的常值用字母来代替,使问题获得巧妙的解答.我们把这种解题方法叫做“常值换元法”.下面我们举例说明妙用“常值换元法”巧解“2016”年份题. The commutative method is a commonly used method of solving mathematical problems, usually referred to as the metamorphic method, which uses an alphabet to represent an unknown algebraic equation, so that the original problem can be simplified, but sometimes it is necessary to identify a certain problem The constant value is replaced by letters, so that the problem is cleverly answered. We call this problem-solving method called “constant value method.” Below we illustrate the magical use of “constant value method” clever solution “2016 ” year title.