减负,是一个常谈常新的话题,数学学习的减负,很大程度上取决于数学作业题的量和质。所以,精心选择和设计数学练习、数学作业是为数学课堂减负、为学生数学学习减负的关键。如何精选作业、加强练习是实施数学新课改的一个研究课题,需要深入探讨。 Burden, is a common topic often new topics, the burden of learning mathematics, largely depends on the amount and quality of math homework. Therefore, careful selection and design of math exercises, math homework is to reduce the burden of mathematics, mathematics learning for students to reduce the burden of the key. How to select homework and strengthen practice is a research topic in the implementation of the new curriculum reform in mathematics, which needs further study.