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1.03*(-0.97)怎么算--要利用平方差公式哦
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人气:140 ℃ 时间:2020-05-22 04:55:15
解答
1.03*(-0.97)
=-1.03*0.97
=-(1+0.03)*(1-0.03)
=-(1-0.0009)
=-0.9991
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