明明家买了一袋米,第一周吃了40%,第二周吃了12kg,还有6kg没吃.这袋米原来有多少千克?
人气:125 ℃ 时间:2019-10-10 05:07:23
解答
(12+6)÷(1-40%)
=18÷60%
=18÷0.6
=30(千克)
答:这袋大米原来有30千克.
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