一桶水用去75%后,还剩80千克,这桶水原来重多少千克?
一桶水用去75%后,还剩80千克,这桶水原来重多少千克?
数学人气：900 ℃时间：2019-09-21 06:47:40
优质解答
80÷（1-75%）=320（千克）
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