Question

Qual e o resultado (3/4+ 4/5 ) =

Answer 1

$\dfrac{3}{4} + \dfrac{4}{5}$

MMC de 4, 5 = 20

$\dfrac{5*3 + 4*4}{20} \\ \\ \\ \dfrac{15 + 16}{20} \\ \\ \\ => \dfrac{31}{20}$

Answer 2

Qual e o resultado (3/4+ 4/5 ) =
  3 + 4 =    15 + 16 ==>  31
  4    5           20            20