(1).2005-395+605 (2).1.25*1.5*8*15分之1 (3).86分之85*87 (4).8分之3*8.4+2又5分之3*0.375-8分之3
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![(1).2005-395+605 (2).1.25*1.5*8*15分之1 (3).86分之85*87 (4).8分之3*8.4+2又5分之3*0.375-8分之3](/uploads/image/z/6881565-21-5.jpg?t=%281%29.2005-395%2B605+%282%29.1.25%2A1.5%2A8%2A15%E5%88%86%E4%B9%8B1+%EF%BC%883%EF%BC%89.86%E5%88%86%E4%B9%8B85%2A87+%EF%BC%884%EF%BC%89.8%E5%88%86%E4%B9%8B3%2A8.4%2B2%E5%8F%885%E5%88%86%E4%B9%8B3%2A0.375-8%E5%88%86%E4%B9%8B3)
(1).2005-395+605 (2).1.25*1.5*8*15分之1 (3).86分之85*87 (4).8分之3*8.4+2又5分之3*0.375-8分之3
(1).2005-395+605 (2).1.25*1.5*8*15分之1 (3).86分之85*87 (4).8分之3*8.4+2又5分之3*0.375-8分之3
(1).2005-395+605 (2).1.25*1.5*8*15分之1 (3).86分之85*87 (4).8分之3*8.4+2又5分之3*0.375-8分之3
(1).2005-395+605
=2005+605-395
=2610-400+5
=2210+5
=2215
(2).1.25*1.5*8*15分之1
=(1.25*8)*(1.5*1/15)
=10*0.1
=1
(3).86分之85*87
=85/86*(86+1)
=85+85/86
=85又85/86
(4).8分之3*8.4+2又5分之3*0.375-8分之3
=3/8*(8.4+2.6-1)
=3/8*10
=3.75