85.6×42+856×6.8-856的简便计算

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85.6×42+856×6.8-856的简便计算
85.6×42+856×6.8-856的简便计算

85.6×42+856×6.8-856的简便计算
85.6×42+856×6.8-856
=85.6*42+856*5.8
=85.6*42+85.6*58
=85.6*100
=8560