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[tex] (\frac{1}{222} + \frac{1}{333} + \frac{1}{444} + \frac{1}{555} + \frac{1}{666}) : (\frac{1}{2}+ \frac{1}{3}+ \frac{1}{4} + \frac{1}{5}+ \frac{1}{6} )=[/tex]

Răspuns :

[tex] \frac{1}{111} ( \frac{1}{2} + \frac{1}{3} + \frac{1}{4} + \frac{1}{5} ):( \frac{1}{2} + \frac{1}{3} + \frac{1}{4} + \frac{1}{5})=[/tex]
=[tex] \frac{1}{111} [/tex]