设总数为X个,则徒弟加工了2/5 X个
3(2/5 X-15)=X-2/5 X+15
6/5 X-45=3/5 X+15
3/5 X=60
X=100
则徒弟加工了:2/5 X=100×2/5=40
师徒一批零件,徒弟做了总数的2/5,如果给师傅15个,徒弟和师傅的零件个数比是1:3,徒弟加工了多少个?
师徒一批零件,徒弟做了总数的2/5,如果给师傅15个,徒弟和师傅的零件个数比是1:3,徒弟加工了多少个?
不要用比例解的 算术法即可
不要用比例解的 算术法即可
数学人气:627 ℃时间:2019-08-19 22:47:41
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