新课程标准指出,初中数学的课堂应从学生的实际情况出发,创设有利于学生自主学习的问题情境,引导学生通过实践、思考、探索、交流,获得知识,形成技能,发展思维,学会学习,促使学生在教师的指导下生动活泼地、主动地、富有个性地学习.问题是学生研讨的平台.有效地进行问题解决的学习,有助于增进数学思维能力,培养创造性的精神.在 The new curriculum standard states that junior high school mathematics classroom should start from the actual situation of students and create problem situations conducive to students’ autonomous learning. Students should be encouraged to think, explore, communicate, gain knowledge, form skills, develop thinking, learn to promote Students under the guidance of the teacher lively, proactive, full of personality to learn the problem is a platform for students to discuss effectively solve problem-solving learning, help to improve mathematical thinking ability, develop creative spirit.