分类讨论是一种很重要的解决数学问题的方法。灵活运用分类讨论,可以使我们的数学思维更加缜密,从而有效地避免漏解或错解。在解决实际问题时,有些数学问题需要分类讨论,现举两例说明。一、行程问题中的分类讨论例1:一列慢车从A地开往300千米的B地,同时,一辆快车从B地开往A地,已知慢车的速度为每小时40千米,快车速度 Taxonomy is a very important way to solve mathematical problems. The flexible use of disaggregated discussions can make our mathematical thinking more rigorous and effectively avoid mistakes or misunderstandings. In solving practical problems, some mathematical problems need to be discussed separately, and two examples are given. First, the classification of travel problems discussion Example 1: A local train from A to 300 km B, at the same time, a fast train from B to A, known local speed of 40 kilometers per hour, Express speed