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下面以一道题为例,和同学们共同探讨多种方法设未知数解应用题。题目:学校田径队的小刚在400米跑测试时,先以6米/秒的速度跑完了大部分路程,最后以8米/秒的速度冲刺到达终点,成绩为1分零5秒,问
Let’s take a question as an example below to discuss with students how to apply unknown solutions. Subject: Xiaogang of the school’s track and field team ran most of the distance at a speed of 6m/s during the 400m test, and finally reached the finish with a speed of 8m/s. The result was 1 minute and 5 seconds.