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数学
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计算:99999+9999+999+99+9=______.
人气:320 ℃ 时间:2019-10-02 09:04:08
解答
99999+9999+999+99+9,
=(100000-1)+(10000-1)+(1000-1)+(100-1)+(10-1),
=(100000+10000+1000+100+10)-(1+1+1+1+1),
=111110-5,
=111105;
故答案为:111105.
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