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73.9-3.87/5/0.387用简便方法计算
人气:371 ℃ 时间:2020-05-20 15:08:58
解答
73.9-3.87/5/0.387
=73.9-3.87/0.387/5
=73.9-10/5
=73.9-2
=71.9
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