314*31.4+628*68.6+68.6*68怎样简便计算急急急急急!虽然无悬赏,但是请各位大哥大姐帮帮忙!

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314*31.4+628*68.6+68.6*68怎样简便计算急急急急急!虽然无悬赏,但是请各位大哥大姐帮帮忙!
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314*31.4+628*68.6+68.6*68怎样简便计算急急急急急!虽然无悬赏,但是请各位大哥大姐帮帮忙!
314*31.4+628*68.6+68.6*68怎样简便计算
急急急急急!虽然无悬赏,但是请各位大哥大姐帮帮忙!

314*31.4+628*68.6+68.6*68怎样简便计算急急急急急!虽然无悬赏,但是请各位大哥大姐帮帮忙!
314*31.4+628*68.6+68.6*68
=314*31.4+1256*31.4+31.4*136
=31.4*(314+1256+136)
=31.4*1706
=53586.4

原式=314*31.4+68.6*(686+628)
=314*31.4+68.6*314+68.6*1000
=314*(31.4+68.6)+686*100
=100*(314+686)
=10000