7分之3÷[(3分之2-2分之1)×7分之6]
=3/7÷[1/6×6/7]
=3/7÷1/7
=3/7×7/1
=3
(3分之2-2分之1)÷(3分之5×6分之5)
=1/6÷25/18
=1/6×18/25
=3/25
(3分之2-2分之1÷3分之5)×6分之5
=(2/3-1/2×3/5)×5/6
=(2/3-3/10)×5/6
=2/3×5/6-3/10×5/6
=10/18-1/4
=20/18-9/36
=11/36
不能简便
7分之3÷[(3分之2-2分之1)×7分之6]
=3/7÷[1/6×6/7]
=3/7÷1/7
=3/7×7/1
=3
(3分之2-2分之1)÷(3分之5×6分之5)
=1/6÷25/18
=1/6×18/25
=3/25
(3分之2-2分之1÷3分之5)×6分之5
=(2/3-1/2×3/5)×5/6
=(2/3-3/10)×5/6
=2/3×5/6-3/10×5/6
=10/18-1/4
=20/18-9/36
=11/36
不能简便