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在学习实数的过程中,经常会遇到如近似数、近似值、精确度与有效数字(effective figure)等概念,本文就这些概念做些简析,供同学们参考.
In the process of learning real numbers, we often encounter concepts such as approximate numbers, approximate values, accuracy and effective figures. This article will give some brief analysis of these concepts for reference by students.