自江苏省“五严”禁令颁布后,学校和老师对忌碰的“高压线”更加敏感,课时不能随意挪、占,课后作业要适量,学生在校时间要严格控制,总之要减负还要增效。那么要实现学生课后的减负,应当落实在课堂增效上,而这离不开优化练习设计使数学课堂扎实高效这一环节。练习在小学数学教学中占有重要地位,几乎没有一节数学课能离开练习, Since the promulgation of the “Five Strict” ban in Jiangsu Province, schools and teachers are more sensitive to avoid touching the “high-voltage line”, class can not be arbitrarily move, accounting, after-school homework should be moderate, students in school time to be strictly controlled, in short To reduce the burden but also efficiency. So to achieve the burden reduction of students after class should be implemented in classroom efficiency, which can not do without optimization exercises designed to make the mathematics class a solid and efficient this link. Practice in primary school mathematics teaching occupies an important position, almost no section of mathematics can leave practice,