Through numerical analysis method, a great number of data is treated on computer to form a table, for manual calculation.

并运用数值分析方法对大量数据进行电算，制作成表，供人工手算时使用。

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Based on the analysis of the look-up table method and Newton iteration algorithm the paper improves the Newton iteration method for the square root calculation.

在分析了查表法以及牛顿迭代法的基础上，对开平方计算的牛顿迭代法进行了改进。

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So this paper also put forward a calculation method to obtain consumption-based intermediate input data based on input-output table.

投入产出法是根据我国的投入产出表数据以及表中各数据间的关系，利用投入产出表中的两大恒等关系进行运算的。

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