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多步复合应用题,实质上是两步复合应用题的延伸和发展。多步复合应用题的教学,我们既可以采用分析法,也可以采用综合法。但在教学时我们必须抓好过渡阶段,发展阶段,提高阶段。一、过渡阶段多步复合应用题的过渡方式一般采用比它步数少的应用题来过渡。即三步的用二步来过渡,四步的用三步来过渡,具体可以采用以下三种方法过渡。(1)用增加条件进行过渡;(2)用改变问题进行过渡;(3)用扩充条件进行过渡。例如,某厂计划生产26900个零件,头5天每天生产2180个,后来每天
Multi-step composite applications, is essentially the extension and development of two-step composite applications. Multi-step composite application of teaching, we can use either analytical method, you can also use the integrated method. However, we must grasp the transitional stage, the development stage and the improvement stage in teaching. First, the transitional phase Multi-step composite application of the transition method generally less than the number of steps to solve the problem of transition. That is, the three-step transition with two steps, four-step transition with three steps, the specific can use the following three methods of transition. (1) transition with increased conditions; (2) transition with change issues; (3) transition with expanded conditions. For example, a factory planned to produce 26,900 parts for a daily production of 2,180 in the first 5 days and then daily