“习”以为常,却不寻常;善于挖掘,美不堪言。前苏联数学教育家奥加涅相说:“必须重视,很多习题潜藏着进一步扩展其数学功能、发展功能和教育功能的可能性,……”那么,我们如何恰当运用,不断挖掘课本中例、习题的多种功能,深化教学?笔者认为,通过将问题进行恰当的扩展、引申,可以较好地发挥其内在的潜能,以达到举一反三、触类旁通的效果。 “Xi ” used to be unusual, but unusual; good at mining, the United States unspeakable. Former Soviet Mathematical Educator Ogilvie said: “We must pay attention to many exercises that hid potential for further expansion of their mathematical functions, developmental functions and educational functions...” Well, how can we properly use and continue to dig textbooks For example, the multiple functions of exercises, to deepen the teaching? The author believes that by properly expanding the issue, extended, you can better play its inherent potential in order to achieve the goal of “giving top priority to others”.