86.4/0.24*0.25 (如何简便)
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86.4/0.24*0.25 (如何简便)
86.4/0.24*0.25 (如何简便)
86.4/0.24*0.25 (如何简便)
86.4/0.24*0.25
=86.4/24*25
=86.4÷4÷6×25
=21.6÷6×25
=3.6×25
=90
86.4/0.24*0.25
=21.6*4/0.24*0.25
=21.6/0.24*(4*0.25)
=90*1
=90