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教学过程:一、创设情境,感知策略(1)去科技馆怎样行走?(2)原路返回时该怎样行走?(3)去时的路线与返回的路线有什么关系?(4)这种思考问题的方法有什么特点?师:倒过来推想,能帮助我们解决一些实际问题,今天我们就一起研究“倒推”策略。(揭示课题)
(2) How to walk on the way back? (3) What is the relationship between the time of departure and the route of return? (4) This kind of teaching method What are the characteristics of the method of thinking? Teacher: The idea of the other way can help us to solve some practical problems. Today, we study the strategy of “pushback”. (Reveal the subject)