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64.68-64.68/2.8能简便计算么

题目详情
64.68-64.68/2.8能简便计算么
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答案和解析
64.68-64.68/2.8
=64.68-64.68×5/14
=64.68×(1-5/14)
=64.68×9/14
=41.58