(8/9-5/6)÷(1/6+2/3)
=(8/9-5/6)÷5/6
腔帆蚂 =8/9×6/5-1
=16/15-1
伍埋 轿仔=1/15
25/24÷[(15/8-3/4)×20/27]
=25/24÷[(15/8-6/8)×20/27]
=25/24÷(9/8×20/27)
=25/24×8/9×27/20
=5/4
(8/9-5/6)÷(1/6+2/3)
=(8/9-5/6)÷(1/6+4/6)
=(8/9-5/6)÷5/6
=8/9÷5/6-5/6÷5/6
=8/逗培9×6/5-1
=16/15-1
=1/山闷唯罩枯15
25/24÷[(15/8-3/4)×20/27]
=25/24÷[(15/8-6/8)×20/27]
=25/24÷(9/8×20/27)
=25/24÷5/6
=25/24×6/5
=5/4
1/15
5/4