| 单词 | rounding error |
| 释义 | rounding error The error introduced when figures are rounded, that is, are shown to fewer decimal places than those to which they were originally measured or calculated. When two or more rounded figures are added, the rounded total may not agree with the sum of the components: for example, 1.3 + 1.4 = 2.7; but if the figures are printed showing only whole numbers, they appear as 1, 1, and 3, which does not equal 1 + 1. In more complex calculations, and in particular sequences of calculations, rounding errors may cumulate and make a large difference to the results. In consequence it is prudent to perform most calculations to more decimal places than one intends to use in presenting the final results, and the more elaborate the calculation, the more spare decimal places it is worth while carrying. |
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