1
相距 80x3÷4x（4+5）=60x9=540千米
2
（1-1/12x4）÷1/15
=2/3÷1/15
=10天
在右上角点击【评价】,然后就可以选择【满意,问题已经完美解决】了.
1.一辆客车和一辆货车同时从甲乙两地相对开出,三小时后相遇.货车每小时行80km,货车与客车的速度比是4:5,甲乙两地相距多少千米?
1.一辆客车和一辆货车同时从甲乙两地相对开出,三小时后相遇.货车每小时行80km,货车与客车的速度比是4:5,甲乙两地相距多少千米?
2.修一条公路,甲队单独修需15天完成,乙队单独修须12天完成,两队合修四天后乙队调走,剩下的路有甲队继续修完.甲队共休了多少天?
2.修一条公路,甲队单独修需15天完成,乙队单独修须12天完成,两队合修四天后乙队调走,剩下的路有甲队继续修完.甲队共休了多少天?
数学人气：984 ℃时间：2019-08-20 13:09:09
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