4 3/5:(1 2/3-3 1/5)+1 3/8=-1 5/8
1. 1 2/3 -3 1/5 =5/3-16/5=25-48/15=-23/15
2. 4 3/5:(-23/15)=23/5:(-23/15)= -23*15/5*23=-3
3. -3+1 3/8=-1 5/8
№2
1 8/11+2 2/19*(1 4/5-2 3/4)=-3/11
1. 1 4/5-2 3/4= 9/5- 11/4= 36-55/20=-19/20
2. 2 2/19*(-19/20)= - 40/19* 19/20-2
3. 1 8/11+ (-2)= 1 8/11-2=-3/11