2)-0.75 + (-1 1/5) -2 1/7 + (-3.8) -1 1/6 + (-2.2) 

1) - 0.75 + ( - 1 1/5 ) = - ( 0.75 + 1 1/5 ) = - ( 3/4 + 6/5 ) = - ( 15 + 24) / 20 =     = - ( 39/20 ) = ( - 1 19/20 ) ======================================================= 2) - 2 1/7 + ( - 3.8) = - ( 2 1/7 + 3.8 ) = - ( 15/7 + 19/5 )=  - ( 75 + 133) / 35 =      = - 208/35 = - 5 33/35  ======================================================= 3) - 1 1/6 + ( - 2.2 ) = - ( 1 1/6 + 2 1/5 ) = - ( 7/6 + 11/5 ) = - ( 35 + 66) / 30 =     = - 101/30 = - 3 11/30