“教有法但无定法。”解决问题的教学策略有多种,但每一种策略的侧重点及效果有所不同。笔者通过长期的教学实践,总结出画图法、还原倒推法、假设法、举例法等几种简单易行的策略,这对于学生拓宽解题思路、灵活运用所学知识具有较强的现实意义。 There are many teaching strategies to solve a problem, but the emphasis and effect of each strategy are different. Through long-term teaching practice, the author sums up a few simple and easy strategies such as drawing method, reduction and pushback method, hypothesis method and example method, which have strong practical significance for students to broaden their thinking and make the best use of their knowledge .