《新课程标准》倡导学生自主学习。学生凭借已有的知识、生活经验和学习方法,自主探索,从而激发学生的学习兴趣,增强学生学好数学的信心,促进学生的发展。在新课程理念背景下,预习不再是单纯为掌握知识和技能而设置的学习活动,而是为了让每一个孩子发展得更好。数学是人类生活的工具;对数学的 The new curriculum standard advocates student self-study. Students rely on existing knowledge, life experience and learning methods, to explore, so as to stimulate students interest in learning, enhance students’ confidence in learning mathematics and promote the development of students. In the context of the new curriculum concept, the preview is no longer a simple learning activities designed to master knowledge and skills, but to make each child develop better. Mathematics is a tool of human life; to mathematics