为了加深和巩固学生对基础知识的理解,培养学生正确而迅速的计算能力、逻辑推理能力和空间想像能力,必须让学生有多练的机会。但是如果布置过多的课外作业,使学生大部分时间都花在完成数学作业上面,就会加重他们的学习负担,对全面提高教学质量是不利的。要解决这一矛盾,加强课堂练习是一项有效的方法。 In order to deepen and consolidate students 'understanding of basic knowledge and train students' correct and rapid calculation ability, logical reasoning ability and spatial imagination ability, students must be given more opportunities to practice. However, if too many extracurricular assignments are arranged so that students spend most of their time doing math exercises, their learning burden will be aggravated, which will be detrimental to the overall improvement of teaching quality. To solve this contradiction, to strengthen classroom practice is an effective way.