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(17又7/27+27又7/17-11又37/39)÷(13又12/17+8又17/27-5又38/39)
=(466/27+466/17-466/39)÷(233/17+233/27-233/39)
=[2×(233/27+233/17-233/39)]÷(233/27+233/17-233/39)
=2
=(466/27+466/17-466/39)÷(233/17+233/27-233/39)
=[2×(233/27+233/17-233/39)]÷(233/27+233/17-233/39)
=2
追答
(17又7/27+27又7/17-11又37/39)÷(13又12/17+8又17/27-5又38/39)
=(466/27+466/17-466/39)÷(233/17+233/27-233/39)
=[2×(233/27+233/17-233/39)]÷(233/27+233/17-233/39)
=2
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