怎样简便计算45乘以14 25乘以24 18乘以4 - 知识问答

怎样简便计算45乘以14 25乘以24 18乘以45

3个回答

45乘以14
=45*2*7
=90*7
=630
25乘以24
=25*4*6
=100*6
=600
18乘以45
=9*2*45
=9*90
=810

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