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yong dao tui fa jie ying yong ti
Author(s): 
Pages: 26
Year: Issue:  6
Journal: Hebei Education

Keyword:  倒推法解应用题副食店电线乒乓球分析推理死路苹果逆运算小学数学;
Abstract: <正> 我们在玩走迷宫游戏时,有时会发现,根据要求从入口找出路,往往会走入死路,如果反过来,从出口向入口走,却能很快走到出发点。数学中有些问题的解答,就像走迷宫一样,需要我们根据题意,从所给的结果出发,抓住逆运算关系,由后向前一步步倒着分析推理,逐步靠拢已知条件,直到问题得到解决。这种思考问题的方法,通常我们把它叫做倒推法。
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