中国的基础教育正从“应试教育”向“素质教育”转轨，并把“提倡解决问题”作为突破口．我们在为抓好“双基”要求学生多做习题，为了“升学竞争”要求学生善做考题的同时，在教学中适当补充具有发散思维特色的开放性问题，以提高学生的数学素质．由于开放性问题的解决，需要 China's basic education is shifting from “exam-oriented education” to “quality education” and takes “promoting problem-solving” as a breakthrough point. In order to do a good job “double basis” require students to do more exercises, in order to “compete in school” requires students to do good test questions, at the same time in teaching appropriate to add divergent thinking characteristics of open issues in order to improve students' mathematical quality. Because of the open problem, we need it