(-56/135)×4 2/7×(-25/28)×22 10/11×(-3 3/8)=122 8/11
1)-56/135×4 2/7=-56/135×30/7=-8/45×10/1=-80/45
2)-80/45×(-25/28)=80/45×25/28=20/9×5/7=100/63
3)100/63×22 10/11=100/63×252/11=100/1×4/11=400/11
4)400/11×(-3 3/8)=-400/11×27/8=50/11×27/1=1350/11=122 8/11