2.72乘以45简便怎么算
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2.72乘以45简便怎么算2.72乘以45简便怎么算2.72乘以45简便怎么算2.72*45=2.72/2*90=1.36*90=1.36*(100-10)=136-13.6=122.4
2.72乘以45简便怎么算
2.72乘以45简便怎么算
2.72乘以45简便怎么算
2.72*45
=2.72/2*90
=1.36*90
=1.36*(100-10)
=136-13.6
=122.4
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