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