17+15=20=52个
甲占:17÷52=17/52
乙占:20÷52=5/13
丙占:15÷52=15/52
一堆零件分给三人加工,甲加工17个,乙加工20个,丙加工15个.加加工了总数的几分之几
一堆零件分给三人加工,甲加工17个,乙加工20个,丙加工15个.加加工了总数的几分之几
数学人气:384 ℃时间:2020-04-09 04:52:36
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