75×(-8.32)×(-4.9)简便算法

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75×(-8.32)×(-4.9)简便算法75×(-8.32)×(-4.9)简便算法75×(-8.32)×(-4.9)简便算法75×﹙﹣8.32﹚×﹙﹣4.9﹚=75×8.32×4.9=75×0.04

75×(-8.32)×(-4.9)简便算法
75×(-8.32)×(-4.9)简便算法

75×(-8.32)×(-4.9)简便算法
75×﹙﹣8.32﹚×﹙﹣4.9﹚
=75×8.32×4.9
=75×0.04×208×4.9
=3×208×4.9
=624×﹙5-0.1﹚
=3120-62.4
=3057.6