78除以78又79分之78的简便算法,
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78除以78又79分之78
=78/(78+78/79)
=78/[78(1+1/79)]
=1/(1+1/79)
=1/(80/79)
=79/80
=78/(78+78/79)
=78/[78(1+1/79)]
=1/(1+1/79)
=1/(80/79)
=79/80
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