Question

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

Answer 1

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

$= - \frac{5786}{900} + \frac{15471}{900} = \frac{15471-5786}{900} = \frac{9685}{900}$

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