1.(1+2.3+3.4)*(2.3+3.4+6.5)-(1-查字典问答网
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  1.(1+2.3+3.4)*(2.3+3.4+6.5)-(1+2.3+3.4+6.5)*(2.3+3.4)2.8.8-0.8*8.8-0.83.(2.8-2.8*0.6)/(0.6+0.52)4.(6.2*1.25+1.25*2.6)/2.25.(1.25*2.7*5.1)/(8.1*0.25*1.7)6.(0.8*0.6/1.2)/0.257[0.35/(3.74-3.24)/0.4]*0.2883.7-3*0

  1.(1+2.3+3.4)*(2.3+3.4+6.5)-(1+2.3+3.4+6.5)*(2.3+3.4)

  2.8.8-0.8*8.8-0.8

  3.(2.8-2.8*0.6)/(0.6+0.52)

  4.(6.2*1.25+1.25*2.6)/2.2

  5.(1.25*2.7*5.1)/(8.1*0.25*1.7)

  6.(0.8*0.6/1.2)/0.25

  7[0.35/(3.74-3.24)/0.4]*0.28

  83.7-3*0.7-3.7*0.6

1回答
2020-04-18 08:26
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韩露

  1.(1+2.3+3.4)*(2.3+3.4+6.5)-(1+2.3+3.4+6.5)*(2.3+3.4)

  =(1.2+2.3+3.4)x(2.3+3.4)+(1+2.3+3.4)x6.5-(1+2.3+3.4)x(2.3+3.4)-6.5x(2.3+3.4)=6.5x(1+2.3+3.4-2.3-3.4)=6.5

  2.8.8-0.8*8.8-0.8=8.8x0.2-0.8=0.8x(2.2-1)=(1-0.2)(1+0.2)=1-0.04=0.96

  3.(2.8-2.8*0.6)/(0.6+0.52)=(2.8x0.4)/1.12=2.8/2.8=1

  4.(6.2*1.25+1.25*2.6)/2.2=1.25x8.8/2.2=1.25x4=5

  5.(1.25*2.7*5.1)/(8.1*0.25*1.7)=(0.25x5x3x0.9x1.7x3)/(9x0.9x0.25x1.7)=5

  6.(0.8*0.6/1.2)/0.25=4x0.8x0.6/(2x0.6)=1.6

  7[0.35/(3.74-3.24)/0.4]*0.28=(0.35/0.5)/0.4x0.28=7/4x0.28=7x0.07=0.49

  83.7-3*0.7-3.7*0.6=3.7x0.4-3x0.7=1.48-2.1=-0.62

2020-04-18 08:31:07

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