3)2 2/11*1 3/8:3/4 5)3/5*(2 2/3:3 1/5)
3)2 2/11*1 3/8:3/4=4 5)3/5*(2 2/3:3 1/5)=0,5 1.2 2/11*1 3/8=3 1.2 2/3:3 1/5=5/6 2.3:3/4=4 2.3/5*5/6=1/2=0,5