设这条路全长为X米
X-(X*1/5+100)-(X-(X*1/5+100))*2/7=500
可解出X=1000
这条路全长为1000米
急忙!十分钟内要!小学数学六年级分数还原法解应用题!
急忙!十分钟内要!小学数学六年级分数还原法解应用题!
主路队修一条路,第一天修了全长的1/5又100米,第二天修了余下的2/7,还剩500米,这条路全长多少米?（用方程解）
又把过程写下来,拜托!
主路队修一条路,第一天修了全长的1/5又100米,第二天修了余下的2/7,还剩500米,这条路全长多少米?（用方程解）
又把过程写下来,拜托!
数学人气：816 ℃时间：2019-08-21 12:53:29
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