1.9+1.99+1.999+1.9999+1.99999+1.999999的简便运算
人气：195 ℃ 时间：2020-03-30 08:27:50
解答
2x6-(0.1+0.01+0.001+0.0001+0.00001+0.000001)
=12-0.111111
=11.888889
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