摘要：培养学生的创新思维和创新能力是当今教育研究的热点，而逆向思维是创新思维的一种重要形式。学生在数学学习、解决问题的思维活动中，常习惯于正向思维，而忽视逆向思维的运用。本文主要阐述了在数学解题中，通过对公式、定理的逆向使用，不仅可以使很多数学问题运算简化，而且还能培养学生思维的敏捷性，提高学生的数学能力。

关键词：中学数学； 公式； 定理； 逆向使用

Abstract:Cultivating students' innovative thinking and innovative ability is the education research hot spot, and creative thinking converse thinking is an important form. Students in mathematics learning, problem solving thinking activity, often used to positive thinking, and ignore the use of reverse thinking. This article mainly elaborated in mathematics problem-solving, through the reverse use formula, theorem, not only can make a lot of math problems operations, but can also simplify cultivate the students' thinking agility, improve the students' mathematical ability.

Keywords： the middle school mathematics;  formula;  theorem;  reverse use