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0.26x0.5x2的简便运算

=4.89*(0.5*2)=4.89*1=4.89再看看别人怎么说的.

0.74x0.5+0.26/2=0.74x0.5+0.26x0.5=(0.74+0.26)x0.5=1x0.5=0.5

0.74*0.5+0.26÷2= 0.74*0.5+0.26*0.5= (0.74+0.26)*0.5= 1*0.5= 0.5

0.26/65=(26/100)*(1/65) =(13/100)*2*(1/65) =(13/100)*(1/65)*2 =(1/500)*2 =1/250 结果是250分之1,0.004

1.05*0.26=(1+0.05)*0.26=0.26+0.013=0.273

0.52÷0.26÷2*213.9=0.52÷2÷0.26*213.9=0.26/0.26*213.9=213.9

0.26*(100-2)=0.26*100-0.26*2=26-0.52=25.48

13*0.26÷6.5的简便运算=13÷6.5*0.26=2*0.26=0.52;

35x7x2=35x2x7=70x7=490

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