42.5×6.28-4.25×2.8简便算法50.9-7.3×6.942.5×6.28-4.25×2.8简便的计算方法?
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42.5×6.28-4.25×2.8简便算法50.9-7.3×6.942.5×6.28-4.25×2.8简便的计算方法?42.5×6.28-4.25×2.8简便算法50.9-7.3×6.942.5×6
42.5×6.28-4.25×2.8简便算法50.9-7.3×6.942.5×6.28-4.25×2.8简便的计算方法?
42.5×6.28-4.25×2.8简便算法
50.9-7.3×6.9
42.5×6.28-4.25×2.8简便的计算方法?
42.5×6.28-4.25×2.8简便算法50.9-7.3×6.942.5×6.28-4.25×2.8简便的计算方法?
42.5×6.28-4.25×2.8=4.25×62.8-4.25×2.8=4.25×（62.8-2.8）=4.25×60=255
42.5×6.28-4.25×2.8简便算法50.9-7.3×6.942.5×6.28-4.25×2.8简便的计算方法?
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