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12.5/0.4+25/0.8的简便方法怎么做?

12.5/0.4+25/0.8的简便方法怎么做?12.5/0.4+25/0.8=25/0.8+25/0.8=25/0.4=62.5

(12.5+1.25)*0.8=12.5*0.8+1.25*0.8=10+1=11祝你学习愉快

先用12.5*0.8等于定阀翅合俨骨愁摊传揩10,再用10*3.9等于39式子是:12.5*0.8*3.9=39

12.5*(0.4+0.8)*2.5=12.5*(0.4*2.5+0.8*2.5)=12.5*(1+2)=12.5*3=37.5望采纳谢谢

0.8*0.25*0.4*12.5=(0.8*12.5)*(0.25*0.4)=10*0.1=1这是简便运算的.

0.8*0.25*0.4*12.5 =0.8x12.5x(0.25x4) =10x0.1 =1

=0.4x15x0.8 =0.4x3x5x8 =2x3x8 =48

=(12.5*4+0.25*4)*0.8=(50+1)*0.8=50*0.8+0.8=40+0.8=40.8

12.5*0.8*4+0.25*0.8*4

2.5*(0.4+0.8)*12.5=(1+ 2)*12.5=3*12.5=3.75

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