1、3/11÷(3/4*3/11)
=3/11÷9/44
=3/11*44/9
=4/3
2、6/5*2/3-2/7÷8/7
=4/5-1/4
=11/20
3、5/8*4*1/5
=5/2*1/5
=1/2
4、3/7*(1÷2/3)
=3/7*3/2
=9/14
1、3/11÷(3/4*3/11)
=3/11÷3/11÷3/4
=1÷3/4
=4/3
2、6/5*2/3-2/7÷8/7
=6/5*2/3-2/7*7/8
=4/5-1/4
=16/20-5/20
=11/20
3、5/8*4*1/5
=5/2*1/5
=1/2
4、3/7*(1÷2/3)
=3/7*3/2
=9/14