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(31.25-7.64)+(4.75-4.36)怎么简便计算
人气:141 ℃ 时间:2020-02-05 03:00:12
解答
(31.25-7.64)+(4.75-4.36)
=31.25-7.64+4.75-4.36
=(31.25+4.75)-(7.64+4.36)
=36-12
=24
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