简便算法,可以先用125*8=1000然后73*1000=73000
73x125x12=(8x9+1)x125x12=8x125x9x12+125x4x3=1000x108+500x3=108000+1500=109500
88x125 = (8+80)x125 = 8x125+80x125=1000+10000=11000
73000/125=73*(100/125)=73*4=292
72*125 =9*8*125 =9*1000 =9000
73x125=(72+1)x125=72x125+125=8x125x9+125=1000x9+125=9000+125=9125
88x125=(80+8)*125=80*125+8*125=10000+1000=11000
56X125=7x8x125=7x(8x125)=7x1000=7000
你好:72*125=9*(8*125)=9*1000=9000
88*125=11*8*125=11*1000=11000