随着工农业生产发展和国防建设的需要,科学技术越来越多地向数学提出大量数值计算的问题。在用数值表示一个量以及进行有关这些数值的计算时,所用的数据和方法,有时可得到准确值,但一般都只能得到近似值。例如,表示一个班级的学生数,我们可以肯定这个班级有五十 With the development of industrial and agricultural production and the need of national defense construction, science and technology increasingly put forward a great deal of numerical problems in mathematics. When numerically expressing an amount and performing calculations on these values, the data and methods used sometimes yield accurate values, but generally approximate values ​​are only obtained. For example, to indicate the number of students in a class, we can be sure there are fifty in that class