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（0.3+0.6+2.5)*(0.2*0.4)=
（0.3+0.6+2.5)*(0.2*0.4-0.1)=
2.5*0.2*（0.4-0.1)= (1.7+0.7)*0.2*(0.55-0.1)= 4.2*0.2*(0.4-0.1)= (0.7+0.7+3.3)*0.2*（0.55-0.1)= （0.3+0.6+2.5)*(0.2*10.4-0.1)= （6*0.2*10.4-0.1)=
808.3-800.2=
（0.7+0.7+3.3)*0.2*(0.4-0.1)= （0.7+0.7+3.3)*0.2*(0.4-0.1)= （4.2+0.2）*0.2*（0.4-0.1)= （0.7+0.7+3.3)*0.2*(0.4-0.1)= 4.2*0.2*(0.4-0.1)= 2.5*0.2*(0.3-0.1)= (0.3+0.6+2.5)*0.2*(0.4-0.1)=
808.3×0.99
（0.7+0.7+3.3)*0.2*(0.4-0.1)= （0.7+0.7+3.3)*0.2*(0.4-0.1)= （4.2+0.2）*0.2*（0.4-0.1)= （0.7+0.7+3.3)*0.2*(0.4-0.1)= 4.2*0.2*(0.4-0.1)= 2.5*0.2*(0.3-0.1)= (0.3+0.6+2.5)*0.2*(0.4-0.1)= 2.5*0.2*（0.4-0.1)= (1.7+0.7)*0.2*(0.55-0.1)= 4.2*0.2*(0.4-0.1)= (0.7+0.7+3.3)*0.2*（0.55-0.1)= （0.3+0.6+2.5)*(0.2*10.4-0.1)= （6*0.2*10.4-0.1)= 4.2*（0.2*10.4-0.1)= （0.7+0.7+3.3)*0.2*(0.4-0.1)= 4.2*0.2*(0.4-0.1)= 3.5*0.2*(0.5-0.1)= 4.2*0.2*(0.4-0.1)=
50505.3-50000.3=
50505.3×0.99
2693.7-2666.8
2693.7×0.99
67340.3-66666.9
67340.3×0.99
331.7-328.4
（0.1+0.2*(0.4-0.1)*2）*0.2*（3.3-0.5）*24= （0.1+0.2*(0.4-0.1)*3）*0.2*（3.3-0.5）*24= [（0.2+0.2*(0.4-0.1)）*0.2+0.1*0.2*(0.4-0.1)]*（3.1-0.5）*6= [（0.2+0.2*(0.4-0.1)*2）*0.2+0.1*0.2*(0.4-0.1)]*（3.1-0.5）*12=
331.7×0.99
1224.6-1212.4
1224.6×0.99
816.5-808.3
0.3*0.6*3.3*8= 0.3*0.6*3.3*4= 0.4*0.6*3.3*4=
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（0.3+0.6+2.5)*(0.2*0.4-0.1)=
2.5*0.2*（0.4-0.1)= (1.7+0.7)*0.2*(0.55-0.1)= 4.2*0.2*(0.4-0.1)= (0.7+0.7+3.3)*0.2*（0.55-0.1)= （0.3+0.6+2.5)*(0.2*10.4-0.1)= （6*0.2*10.4-0.1)=
808.3-800.2=
（0.7+0.7+3.3)*0.2*(0.4-0.1)= （0.7+0.7+3.3)*0.2*(0.4-0.1)= （4.2+0.2）*0.2*（0.4-0.1)= （0.7+0.7+3.3)*0.2*(0.4-0.1)= 4.2*0.2*(0.4-0.1)= 2.5*0.2*(0.3-0.1)= (0.3+0.6+2.5)*0.2*(0.4-0.1)=
808.3×0.99
（0.7+0.7+3.3)*0.2*(0.4-0.1)= （0.7+0.7+3.3)*0.2*(0.4-0.1)= （4.2+0.2）*0.2*（0.4-0.1)= （0.7+0.7+3.3)*0.2*(0.4-0.1)= 4.2*0.2*(0.4-0.1)= 2.5*0.2*(0.3-0.1)= (0.3+0.6+2.5)*0.2*(0.4-0.1)= 2.5*0.2*（0.4-0.1)= (1.7+0.7)*0.2*(0.55-0.1)= 4.2*0.2*(0.4-0.1)= (0.7+0.7+3.3)*0.2*（0.55-0.1)= （0.3+0.6+2.5)*(0.2*10.4-0.1)= （6*0.2*10.4-0.1)= 4.2*（0.2*10.4-0.1)= （0.7+0.7+3.3)*0.2*(0.4-0.1)= 4.2*0.2*(0.4-0.1)= 3.5*0.2*(0.5-0.1)= 4.2*0.2*(0.4-0.1)=
50505.3-50000.3=
50505.3×0.99
2693.7-2666.8
2693.7×0.99
67340.3-66666.9
67340.3×0.99
331.7-328.4
（0.1+0.2*(0.4-0.1)*2）*0.2*（3.3-0.5）*24= （0.1+0.2*(0.4-0.1)*3）*0.2*（3.3-0.5）*24= [（0.2+0.2*(0.4-0.1)）*0.2+0.1*0.2*(0.4-0.1)]*（3.1-0.5）*6= [（0.2+0.2*(0.4-0.1)*2）*0.2+0.1*0.2*(0.4-0.1)]*（3.1-0.5）*12=
331.7×0.99
1224.6-1212.4
1224.6×0.99
816.5-808.3
0.3*0.6*3.3*8= 0.3*0.6*3.3*4= 0.4*0.6*3.3*4=
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