( 13 /12 - 4/15) : 49/30 + 1/3 =
in paranteza numitorul comun este 60 , aplific prima fractie cu 5 si a doua cu 4
( (13*5)/60 - (4*4)/60) : 49/30 + 1/3=
(65/60 - 16/60) : 49/30 + 1/3=
49/ 60 : 49/30 + 1/3=
49/60 x 30/49 + 1/3=
1/2 + 1/3 =
3/6 + 2/6= 5/6
