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2x125x8x5的筒算

2X125X8X5 =125X8X2X5=1000X10=10000125X897X8=125X8X897=1000X897=89700035X101=35X(100+1)=35X100+35X1=3535973X5X2=973X10=973068X99=68X(100-1)=68X100-68=6800-68=6732请楼主采纳!!!!!

42x125x8x5=(125*8)x(42*5)=1000*210=210000

42x125x8x5=125x8x42x5=1000x210=210000

标题可以先算125*8等于1000.然后再算42*5*1000=210000

42x128x8x5=(42x5)x128x8=210x(125+3)x8=210x(125x8+3x8)=210x(1000+24)=210x1000+210x24=210000+210x6x4=210000+5040=215040 谢谢,请采纳

125*8*5*6*7 =1000*210 =210000

125x16x5的简便运算计算=125x(8x2)x5=125x8x(2x5)=1000x10=10000 祝天天向上.

原式=(125x8)x2x6=1000x2x6=2000x6=12000

2x2x125x125=250X250=(200+50)X(200+50)=(200+50)=200+50+2X200X50=40000+2500+20000=60000+2500=62500

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