《数学课程标准》明确指出:教师的任务就是创设教学情境,激发学生的学习兴趣。我们在具体教学中,先要理解迁移规律,运用好迁移规律,把学生先前学习的基础和基本技能有机地运用,去促进、影响和产生新的知识和 “Mathematical Curriculum Standards” clearly states: The teacher’s task is to create teaching situations, to stimulate student interest in learning. In concrete teaching, we must first understand the law of migration, make good use of the law of migration, and apply the basis and basic skills of students’ prior learning organically to promote, influence and generate new knowledge and