5-3+5=7
大桶要满,小桶要出3千克,剩下2千克.然后再要大桶满,不就是7千克了
有两个桶 大的能装水5千克,小的能装3千克,怎么样从两个桶里匀出7千克水.谁帮我列下算
有两个桶 大的能装水5千克,小的能装3千克,怎么样从两个桶里匀出7千克水.谁帮我列下算
数学人气：564 ℃时间：2020-01-27 20:56:29
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