通过“一题多解”进行全方位的展示拓展让学生从精彩纷呈的解法中提高解题的兴趣,树立学好数学的信心,提高解题思维习惯和解题能力;通过“一题多变”的适当运用,不仅加深学生对所学数学知识的理解,而且还能激发学生的探究精神和学习兴趣更能达到拓展数学思维的作用. Through the “one problem and many solutions” for a full range of display expansion to enable students to improve the problem-solving interest from the brilliant solution, to establish the confidence of learning mathematics, to improve the problem-solving thinking habits and problem solving skills; Change "not only deepens students ’understanding of maths knowledge, but also stimulates students’ exploration spirit and interest in learning so that it can expand the role of mathematical thinking.