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77+2.7+2.7+25的简便算法是什么?
人气：441 ℃　时间：2020-02-05 11:32:06
解答
77+2.7+2.7+25
=75+2+2*2.7+25
=75+25+2+5.4
=100+7.4
=107.4
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