(12.5×2.5×3.2)÷(50×1.6×2.5) 简便计算

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(12.5×2.5×3.2)÷(50×1.6×2.5) 简便计算

(12.5×2.5×3.2)÷(50×1.6×2.5)
=(25×2.5×1.6)÷(2×25×1.6×2.5)
=0.5