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    Without using a calculator, how do you find the nu
    Factor out 1/10^|m-n|, since x^n*y^n=(x*y)^n. 0.5^n-m or 0.2^m-n may now be calculated on the calculator. Alternatively, for the latter case, now factor out (1/10)^m-n and just calculate 2^m-n.
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