倒出油:9-5.5 = 3..5(千克)
原有油:3.5×2 =7(千克)
桶重:9-7 = 2(千克)
一桶油重9千克,倒去一半油后,连桶重5.5千克,问桶有多重?
一桶油重9千克,倒去一半油后,连桶重5.5千克,问桶有多重?
数学人气:698 ℃时间:2019-11-22 15:12:55
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