5又1/2-(4/5+3.6×1/6)×1/4 怎么简便计算?

5又1/2-(4/5+3.6×1/6)×1/4 怎么简便计算?
5又1/2-(4/5+3.6×1/6)×1/4 怎么简便计算?

5又1/2-(4/5+3.6×1/6)×1/4 怎么简便计算?
5又1/2-(4/5+3.6×1/6)×1/4
=5.5-4/5x1/4-3.6x1/4x1/6
=5.5-1/5-0.9x1/6
=5.5-0.2-0.15
=5.15

11/2-(4/5-3.6*1/60)*1/4
=110/20-(1/5-0.9/6)
=110/20-(4/20-3/20)
=109/20
其中0.9/6=0.3/2=3/20