Question

1)-3,8+1,5-4
   ---------------
   7-4,9



2)-0,5*8+1,6*3
------------------------
  0,84-1

Answer 1

$frac{-3.8+1.5-4}{7-4.9} = frac{-6.3}{2.1} =-3$
$frac{-0.5*8+1.6*3}{0.84-1} = frac{0.8}{-0.16} =-5$