如题所述
3.6x42.3x3.75-12.5x0.423x28
=3.6x42.3x3.75-1.25x42.3x2.8
=42.3×（3.6×3×1.25-1.25×2.8）
=42.3×【1.25×（10.8-2.8）】
=42.3×10
=423
有疑问请追问
=3.6x42.3x3.75-1.25x42.3x2.8
=42.3×（3.6×3×1.25-1.25×2.8）
=42.3×【1.25×（10.8-2.8）】
=42.3×10
=423
有疑问请追问
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