计算:(1+0.23+0.34)×(0.23+0.34+0.65)-(1+0.23+0.34+0.65)×(0.23+0.34)
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(1+0.23+0.34)×(0.23+0.34+0.65)-(1+0.23+0.34+0.65)×(0.23+0.34)
=(1+0.23+0.34)×(0.23+0.34)+0.65×(1+0.23+0.34)-(1+0.23+0.34)×(0.23+0.34)-0.65×(0.23+0.34)
=0.65×(1+0.23+0.34-0.230.34)
=0.65×1
=0.65.
=(1+0.23+0.34)×(0.23+0.34)+0.65×(1+0.23+0.34)-(1+0.23+0.34)×(0.23+0.34)-0.65×(0.23+0.34)
=0.65×(1+0.23+0.34-0.230.34)
=0.65×1
=0.65.
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