1. (3/5+2целых1/3):(3,5-2целых1/3)=(3/5+7/3):(7/2-7/3)=44/15:7/6=44/15*6/7=44/5*2/7=88/35=2целых18/35
2. (5,6-3целых1/3):(1,5+1целая1/3)=(28/5-10/3):(3/2+4/3)=34/15:17/6=34/15*6/17=2/5*2=4/5
3.(16-8целых1/3):(-2целых5/9)=(16-25/3):(-23/9)=23/3:(-23/9)= -23/3*9/23= -3
4. (15-9целых2/3):(-3целых5/9)= (15-29/3):(-32/9)=16/3:(-32/9)= -16/3*9/32= -3/2= -1 целая1/2