101*51.8-1.25*51.8*0.8怎么简便

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101*51.8-1.25*51.8*0.8怎么简便101*51.8-1.25*51.8*0.8怎么简便101*51.8-1.25*51.8*0.8怎么简便101×51.8-1.25×51.8×0.8

101*51.8-1.25*51.8*0.8怎么简便
101*51.8-1.25*51.8*0.8怎么简便

101*51.8-1.25*51.8*0.8怎么简便
101×51.8-1.25×51.8×0.8
=101×51.8-(1.25×0.8)×51.8
=101×51.8-1×51.8
=(101-1)×51.8
=100×51.8
=5180