To analyze the rounding error of calculator floating-point Numbers arithmetic operation is the foundation of numerical calculation method's error analysis.
对计算机浮点数算术运算的舍入误差进行分析，是对数值计算方法作误差分析的基础。
The results of verifying calculation show that the analytic formula has smaller computational error as compared with computer numerical arithmetic, and therefore it is practical.
验证计算结果表明：解析公式与计算机数值计算法结果相比较，计算误差小，具有实用价值。
The paper makes mathematical analysis on the causation of error in profile machining, and resolves the problem using altering the method in numerical calculation.
本文对这种加工误差产生的原因进行了数学分析，通过更改数值计算的方法解决这个问题。
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