数学变式学习是一种有利于学生自主探究、合作交流,有利于激发学生的学习兴趣,有利于培养学生的创新意识的数学学习模式,是中学数学学法研究的一个热点。习题变式就是将习题演变,借题发挥,通过变式使学生巩固记忆,完善应变能力,叩开学生的思维之门,提升学生的思维能力和解 Mathematical variant learning is a kind of mathematics learning mode that is conducive to students' spontaneous exploration, cooperation and exchange, is conducive to stimulating students' interest in learning and is conducive to cultivating students' innovative awareness. It is a hot point in the study of middle school mathematics. Exercises are the evolution of the problem, to borrow the title to play, through the variant to enable students to consolidate the memory, improve the adaptability, knock on the students 'thinking door, enhance students' thinking ability and solution