问:540x64+54x370-54o简便计算答:540x64+54x370-54o=540×(64+37-1)=540×100=54000答题完毕,谢谢采纳。
540x64+54x370-540=54x10x64+54x370-54x10=54x640+54x370-54x10=54x(640+370-10)=54x1000=54000