Question

quero saber como faço pra resolver isso. 8.5/4.2

Answer 1

$\boxed{\frac{8.5}{4.2}=\frac{40}{8}=5}$

Answer 2

 8.5/4.2
8 x 5/4 x 2

      5                 8x5x2             80
8 x --- x 2 =      --------       =    ----       =       20
      4                    4                    4