a) 76 : (-19) = **-4**
б) -56 : (-8) = **7**
в) -0,81 : 1,8 = **-0,45**
г) -7$$\frac{4}{5}$$ : (-1$$\frac{11}{15}$$) = -$$\frac{39}{5}$$ : (-$$\frac{26}{15}$$) = -$$\frac{39}{5}$$ * (-$$\frac{15}{26}$$) = $$\frac{39 * 15}{5 * 26}$$ = $$\frac{3 * 3}{2}$$ = $$\frac{9}{2}$$ = **4,5**