Question

7 / 12 + 5 / 2  = day du 

9 / 21 + 6 / 49 = day du

Answer 1

`7/12 + 5/2 = 7/12 +30/12 = (7+30)/12 = 37/12`

`9/21 + 6/49 = 3/7 + 6/49 = 21/49 + 6/49 = (21+6)/49 = 27/49`

 

`#Lanh`

Answer 2

`7/12 + 5/2 = 7/12 + 30/12 = (7 + 30)/12 = 37/12`

`9/21 + 6/49 = 3/7 + 6/49 = 21/49 + 6/49 = (6 + 21)/49 = 27/49`