最多多少页?最少多少页?
- 时间:2020-04-08 12:54:44
- 分类:数学世界
- 阅读:114 次
小明读一本故事书,如果每天读35页,第10天能读完;如果每天读40页,第8天就能读完。这本书最多有多少页?最少有多少页?
分析:按第一种读法可以看出,这本书最多有:35×10=350(页),最少有:35×9+1=316(页)。按第二种读法可以看出这本书最多有40×8=320(页),最少有40×7+1=281(页)。所以,这本书最多有320页(多于320页按第二种读法8天读不完),最少有316页(少于316页按第一种读法读不到第10天)。
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