数学是思维的体操，创新的摇篮。培养学生的创造性思维是数学课堂练习的重要任务之一。而目前小学数学课堂练习的弊病甚多：（ 1）内容封闭。课本上有什么练什么，思路狭窄，答案唯一。（ 2）形式单调。多数是笔答题，动手实践题少。（ 3）要求过死。教师怎样教，学生就怎样练 Mathematics is the gymnastics of thinking and the cradle of innovation. Cultivating students’ creative thinking is one of the important tasks in mathematics classroom exercises. At present, the disadvantages of primary school mathematics classroom exercises are many: (1) Content is closed. What is the practice in the textbook? The idea is narrow and the answer is unique. (2) monotonous in form. Most are pen questions, and there are few hands-on questions. (3) Request to die. How do teachers teach and how do students practice