12345×6789-12346×6799巧算 - 知识问答

12345×6789-12346×6799巧算

1个回答

12345×6789-12346×6799
=12345*6789-12345*6799-6899
=12345*(-10)-6799
=-123450-6800+1
=-123449-6800
=-130249

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