新课标明确指出:“计算应使学生经历从现实生活中抽象数和简单的数量关系,在具体的情景中理解,并应用所学的知识解决问题的过程,应避免繁杂的运算,避免将运算与应用割裂开来”。这也是现在的数学课堂教学中急需要解决的一个问题——即“算”和“用”的和谐统一。 The new curriculum clearly states: “The calculation should enable students to experience the number of abstract from the real life and the simple relationship between the number of specific situations to understand and apply the knowledge of the process of solving the problem, should avoid complicated operations, to avoid Separate computing from application. ” This is also a problem which is urgently needed to be solved in the current mathematics classroom teaching - that is, the harmony and unity of “computing” and “using”.