50/(5/6)/(6/7)/(7/8)/(8/9)／是除号急

题目详情

▼优质解答

答案和解析

50/(5/6)/(6/7)/(7/8)/(8/9)
=50×6/5×7/6×8/7×9/8
=50×（6/5×7/6×8/7×9/8）
=50×9/5
=90

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