6 / 8 + 11 / 7 - 7 / 22 =
= 3 / 4 + 11 / 7 - 7 / 22 =
c.m.m.m. c al numitorilor 4; 7 si 22 = 4 x 7 x 11 = 308
aducem fractiile la acelasi numitor ( 308 )
= ( 77 x 3 ) / ( 77 x 4 ) + ( 44 x 11 ) / 308 - ( 14 x 7 ) / ( 14 x 22 ) =
= 231 / 308 + 484 / 308 - 98 / 308 =
= 715 / 308 - 98 / 308 =
= 617 / 308 =
= 2 intregi si 1 / 308 =
= 2,0032
