简便方法算:17/25x5/37+18/25x17 - 知识问答

简便方法算:17/25x5/37+18/25x17/37+17/37x14/25 (11-1

1个回答

17/25×5/37+18/25×17/37+17/37×14/25
=17/37×(5/25+18/25+14/25)
=17/37×37/25
=17/25
(11-1/25X7)+(9-11/25x5)+(7-11/25x3)
=11+9+7-1/25×(7+55+33)
=27-3.8
=23.2

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