原式=(125x8)x(4x5)=1000x20=20000 供参考.
解125x111x5x8x2=125x8x111x5x2=1000x5x2x111=1000x10x111=11100000
121x2x125x25x5x8x4=121*(2*5)*(125*8)*(25*4)=121*10*1000*100=121000000
=121* 2* 5* 5* 5* 5* 5* 5* 2* 2*2* 2* 2 = 121* 10* 10* 10* 10* 10 =12100000
用简便方法计算125x12x8x4125x12x8x4=125*8*12*4=1000*48=48000
432x2x12x25x5x4x8 =(432*2*12*4)*(25*5*8) =41472*1000 =41472000 72x125x7 =9*8*125*7 =(8*125)*(9*7) =1000*63 =63000
利用乘法交换律以及乘法结合律:原式=(125x8)x(25x4)x(5x2)x432=1000x100x10x432=432000000望采纳
解:原式=5x8x125x4x121x2=40x500x242=20000x242=4840000
125*8*25*4 =1000*100 =100000
原式=137*(5*20)*(125*8)=137*100*1000=13700000 希望对你有帮助,满意请及时采纳,你的采纳是我回答的动力!