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0.008乘以0.425用简便方法怎么做

0.008*0.425=425*8=3400

写0.425X 0.008

4.25乘以0.54加上0.425乘以4.6简便方法?4.25*0.54+0.425*4.6=4.25*0.54+4.25*0.46=4.25*(0.54+0.46)=4.25*1=4.25.

0.8*72.4*12.5=0.8*12.5*72.4=10*72.4=724

0.756乘10.8减76.5乘0.008=0.756x10.8-0.756x0.8=0.756x(10.8-0.8)=0.756x10=7.56

425;20

0.038*4.25=(0.04-0.002)*4.25=0.17-0.0085=0.1615

7.45*(1-0.1)=7.45*1-7.45*0.1=7.45-0.745=6.545 我是老师 谢谢采纳

0.25*4.78*0.8简便方法=0.25*(4*0.2)*4.78=0.25*4*0.2*4.78=1*0.2*4.78=0.956

解:原式=780x6900=(800-20)x(7000-100)=800x7000-800x100-20x7000+20x100=5600000-80000-140000+2000=5,382,000答:答案是5,382,000.

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