甲20x3/8=7.5
丙20x5/8=12.5
甲乙丙三个数的比是3:8:5,乙数是20,甲丙两数是多少?
甲乙丙三个数的比是3:8:5,乙数是20,甲丙两数是多少?
数学人气:232 ℃时间:2019-10-17 07:59:13
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