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61.2-1.8 *3-4.
人气:480 ℃ 时间:2019-12-01 11:06:17
解答
61.2-1.8 *3-4.6
=61.2-5.4-4.6
=61.2-(5.4+4.6)
=61.2-10
=51.2
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