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0.7777%0.7 0.1111%2.1

0.7777X0.7X3+0.1111X2.1X3=nX3 0.7777 x 2.1 + 0.3333 x 2.1=n x 3 (0.7777+0.3333) x 2.1 = n x 3 (0.7777+0.3333) x 2.1 ÷ 3 = n x 3 ÷ 3 (0.7777+0.3333) x 0.7 = n 1.111x 0.7 = n n=0.7777

0.7777*0.7+0.1111*7*0.3=0.7777 希望能帮助你~~

0.7777*0.7+0.1111*2.1=(0.1111*7)*0.7+0.1111*2.1=0.1111*(7*0.7)+0.1111*2.1=0.1111*4.9+0.1111*2.1=0.1111*(4.9+2.1)=0.1111*7=0.7777

213,3

=0.1111*(4.9+2.1)=0.1111*7=0.7777

题目是不是下面这个啊?0.7777*0.7+0.1111*2.1=0.1111*4.9+0.1111*2.1=0.1111*(4.9+2.1)=0.1111*7=0.7777

(1)1.9*8.8-0.88 =(2-0.1)*8.8-0.1*8.8 =2*8.8-0.2*8.8 =17.6-1.76 = 15.84(2)0.7777*0.7+0.1111*2.1 =0.7777*0.7+0.7777*0.3 =0.7777*(0.7+0.3) =0.7777(3)888*1.6+222*3.6 =222*4*1.6+222*3.6 =222*(6.4+3.6) =222*10 =2220

0.7777*0.7+0.1111*5.1=(0.1111*7)*0.7+0.1111*5.1=0.1111*7*0.7+0.1111*5.1=0.1111*(7*0.7)+0.1111*5.1=0.1111*(7*0.7+5.1)=0.1111*(4.9+5.1)=0.1111*10=1.111

0.1111*(7*0.7+0.1)=0.1111*5=0.5555 2.4*(1-0.5)=1.2

0.7777X0.7+0.1111X0.1 =(0.7x0.7+0.1x0.1)+(0.07x0.7+0.01x0.1)+(0.007x0.7+0.001x0.1)+(0.0007x0.7+0.0001x0.1) =0.5+0.05+0.005+0.0005 =0.5555

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