7x75-7x25 =7x(75-25) =7x50 =350
9x75一7x25=25*(27-7)=25*20=500
7*75-7*25=7*(75-25)=7*50=350
7*75-7*25简便计算=7*(75-25)=7*50=350
9x3x25-7x25(9x3-7)x2520x25500
解:1/75x7/18x75=(1/75x75)x7/18=1x7/18=7/18=18分之7
7*75-7*25=7x(75-25)=7x50=350
(7x6)x25 =7x6x25=7x150=1050您好,答题不易如有帮助请采纳,谢谢
原式=(75x4)x25=75x(4x25)=75x100=7500
7*75-25*7=7*(75-25)=7*50=350