How is the function of the slide rule described differently from the exactness of the Pascaline?

Answer

The slide rule works on approximation and scaling rather than exact digital manipulation

The slide rule, based on logarithms, provides quick, reasonably precise results through aligning continuous scales, contrasting with the Pascaline's goal of exact, gear-locked results.

How is the function of the slide rule described differently from the exactness of the Pascaline?

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