(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÷7/8
=4/5 - 2/7×(8/7)
=4/5 - 16/49
=196/245 -80/245
=116/245
(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÷7/8
=4/5 - 2/7×(8/7)
=4/5 - 16/49
=196/245 -80/245
=116/245
(3)5/8×4×1/5
=5/2 ×(1/5)
=1/2
(4)3/7×(1÷2/3)
=3/7 ×(3/2)
=9/14