第二天生产的比总数的1/4少30个
- 时间:2020-05-17 12:29:01
- 分类:数学世界
- 阅读:181 次
数学题:生产一批零件,第一天生产了180个,第二天生产的比总数的1/4少30个,两天共生产了总数的1/3,一共有多少个零件?【用算术方法解】
数学题解答:(180-30)÷(1/3-1/4)
分析:第二天生产的比总数的1/4少30个,两天产量合并后,从第一天生产的拿30个给第二天,这样第二天正好占总数的1/4,而第一天变成了150个,这150个占总数的:1/3-1/4=1/12,所以用上面的方法计算。
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