一桶油第一天用去百分之40,第二天用去12.5千克,还剩下一半,这桶油原来有多少千克?
一桶油第一天用去百分之40,第二天用去12.5千克,还剩下一半,这桶油原来有多少千克?
数学人气:150 ℃时间:2019-10-23 04:10:56
优质解答
这桶油原来有:12.5/(50%-40%)=125千克
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