(2.5x88-2.5x0.8)x1.25
=(2.5*11-2.5*0.1)*1.25*8
=2.5*(11-0.1)*1.25*8
=2.5*10*(11-0.1)
=25*(10+1)-2.5
=250+25-2.5
=272.5
125x64x0.25
=125*8*2*(4*0.25)
=1000*2*1
=2000
现在这个答案我确定了。
原式=(2.5x11-2.5x1)x1.25x8
=2.5x(11-1)x1.25x8
=2.5x10x10
=250
原式=125x8x8x0.25=1000x2x4x0.25=1000x2=2000
(2.5x2x44-2.5x2x0.4)x1.25
=(5x4x11-5x4x0.1)x1.25
=5x11x6-5x6x0.1
=330-3
=327
125x64x0.25
=125x16x4x0.25
=125x16
=5x25x4x4
=20x100
=2000
125x64x0.25
=125*8*0.25*8
=1000*2
=2000
(2.5x88-2.5x0.8)x1.25
=2.5x88x1.25-2.5x0.8x1.25
=2.5x11x1.25x8-2.5x1
=27.5-2.5
=25
=25*5*4*4*4*0.25
=25*4*0.25*4*5*4
=100*1*20
=2000