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数学
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一根绳子的长度等它本身长度的7分之6,加上2.5米,这根绳子长()米?
急
人气:488 ℃ 时间:2019-08-22 13:10:38
解答
它本身长度的7分之6,加上2.5米是他自身
所以2.5米是他自身的1-7分之6
所以长2.5÷(1-7分之6)=17.5米
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