11乘99=1089 111乘999=110889 1111乘9999=11108889
请计算,n为正整数时,11.11*99.9的值为
人气：415 ℃ 时间：2019-12-07 01:10:18
解答
（n-1）个1,1个0,（n-1）个8,一个9
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