08-16-2017, 10:04 PM
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We should always treat at least the final digit of a calculator answer
with some skepticism. Indeed different calculators can give (mildly) different
answers. In applied work, we need to pay heed to the fact that the standard
tools, such as calculators and computer programs, work only to limited
precision. In a complex calculation, minor inaccuracies may result in a
significant error.