列方程解应用题是常见的数学方法,许多同学往往感到困难,其实,解应用题最重要的是审题,从问题中找出等量关系列方程。用方程解应用题可以巧用“未知化已知”找等量关系,下面举几例加以说明。例1一个两位数,十位上的数字比个位上的数字小1,十位上的数与个位上的数的和是这个两位 The application of equations to solve equations is a common mathematical method. Many students often find it difficult to solve problems. In fact, the most important thing in solving an application problem is to examine questions, and to find the equations of equations in the equation. Using equations to solve problems can be used to find the relationship of “known unknown” to find equal relations. The following gives a few examples to illustrate. Example 1 is a two-digit number. The number in the tens place is one less than the number in the place. The sum of the number in the tens place and the number in the place is the two