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explidati va rog cum fac acest exercitiu -6,42(8)+17,19....

Răspuns :

-6,42(8)+17,19= [tex]- \frac{6428-642}{900} + \frac{1719}{100} =- \frac{5786}{900} + \frac{1719*9}{100*9} =[/tex]

[tex]= - \frac{5786}{900} + \frac{15471}{900} = \frac{15471-5786}{900} = \frac{9685}{900} [/tex]

sau, 17,190-6,42(8)=10,76(1)

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