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2.25×3/5+2.75÷5/3简算
人气：380 ℃　时间：2020-03-28 03:37:14
解答
2.25×3/5+2.75÷5/3
=2.25×3/5+2.75×3/5
=3/5×(2.25+2.75)
=3/5×5
=3
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