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9.8*62.5*1.25—12.5*0.625*18
人气:427 ℃ 时间:2020-01-26 05:29:40
解答
98*0.625*12.5-12.5*0.625*18
=12.5*0.625*(98-18)
=12.5*5/8*80
=12.5*50
=625
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