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125x14x4x8x25x5x20这道题怎样简便计算?求答案急急

原式=(125x8)x(4x25)x(5x20)x14 =1000x100x100x14 =10000000x14 =140000000

265252859812191058636308480000000

50x25x4x20用简便计算怎么计算? 50x25x4x20 =50*20*25*4 =1000*100 =100000

19x25x4x20=25×4×20×19=100×20×19=38000

5X125X20X25X32

145x25x20x95 =145×(25×20)×(100-5) =145×500×(100-5) =72500×100-72500×5 =7250000-362500 =6887500

125x14x4x8x25x5x20 =125x8x4x25x5x20x14 =(125x8)x(4x25)x(5x20)x14 =1000x100x100x14 =140000000

35×4×25×20 =(35×20)×(25×4) =700×100 =70000 乘法交换律。 把简单用易计算的组合起来

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