有效的数学教学活动是教师教和学生学的统一,应体现“以人为本”的理念,学生的观点无论是对或错,都应该有存在的价值,教师要鼓励学生说出自己的想法,敢于发表自己的观点。没有表达,就没有质疑,更不会有思维的碰撞,也就没有了创新,正所谓:“百花齐放,才不一叶障目;百鸟齐鸣,才不人云亦云”。 Effective mathematics teaching activities are the unity of teachers ’teaching and student learning, and should embody the idea of ​​“people-oriented”. Students’ opinions, whether they are right or wrong, should have existent value. Teachers should encourage students to express their own ideas, Dare to express their point of view. No expression, there is no question, but there will be no collision of thinking, there is no innovation, is the so-called: "all flowers bloom, it is not a leaf barrier;