1 3/5 -(5/8*0,8+1 3/5):2=1.6 -(0,5+1,6):2=1,6-2,1 :2=1,6-1,05=0,55
1,6-(1,6+0,625*0,8):2=1,6-(1,6+0,5):2=1,6-2,1:2=1,6-1,05=0,55
