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75×27＋19×25的简便算法
人气：396 ℃ 时间：2020-03-30 01:30:04
解答
75×27＋19×25
=(25×3)×27＋19×25
=25×(3×27)＋19×25
=25×81＋19×25
=25×(81＋19)
=2500
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