Question

Me ajudem por favor!!!!!!

Answer 1

Oi :) 

Segue: 
$- \frac{1}{2}+ \frac{7}{3}-2= \frac{-3+14-12}{6}= -\frac{1}{6}$

$3-7* \frac{3}{5}=3- \frac{21}{5}= \frac{15-21}{5} = -\frac{6}{5}$

$-( \frac{3}{7} - \frac{4}{7} )+( \frac{2}{5} : \frac{7}{5} )=- (-\frac{1}{7}) +( \frac{2}{5} * \frac{5}{7} )= \frac{1}{7}+ \frac{2}{7}= \frac{3}{7}$

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