1.25x0.24x0.8
=5x0.25x0.4x0.6x0.8
=(5x0.6x0.8)x(0.25x0.4)
=(3x0.8)x0.1
=2.4x0.1
=0.24
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1.25x0.24x0.8
＝1.25*0.2*0.24*0.4
＝2.5*0.4*0.24
＝1*0.24＝0.24
1.25x0.24x0.8
=1.25×0.8×0.24
=1×0.24
=0.24
1.25x0.24x0.8
=1.25*0.8*0.24
=1*0.24
=0.24
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