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一台织布机五分之四小时可以织布三分之二米.要织六分之五米的布,需要多少小时、
人气:196 ℃ 时间:2020-02-05 04:15:12
解答
要5/6÷(2/3÷4/5)
=5/6×6/5
=1小时
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