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【OG20-P159-86题】
Shawana made a schedule for reading books during 4 weeks (28 days) of her summer vacation. She has checked out 12 books from the library. The number of pages in each book and the order in which she plans to read the books are shown in the table above. She will read exactly 50 pages each day. The only exception will be that she will never begin the next book on the same day that she finishes the previous one, and therefore on some days she may read fewer than 50 pages. At the end of the 28th day, how many books will Shawana have finished?
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【答案】B
【解析】Book1: 253÷50=5....3,看这本书是第1天到第6天。
Book2: 110÷50=2....10,看这本书是第7天到第9天。
Book3: 117÷50=2....17,看这本书是第10天到第12天。
Book4: 170÷50=3....20,看这本书是第13天到第16天。
Book5: 155÷50=3....5,看这本书是第17天到第20天。
Book6: 50÷50=1,看这本书是第21天。
Book7: 205÷50=4....5,看这本书是第22天到第26天。
Book8: 70÷50=1....20,看这本书是第27天到第28天。
所以,28天总共看完了8本书。
【知识点补充】
被除数÷除数=商.....余数
被除数=除数×商+余数
题目讨论 (4条评论)

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999+
表格最右边那一竖排给的信息是拿来干嘛的呀 用那边的数据算的话还会算出错误答案 ?
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0 回复 2021-10-10 16:01:59
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637298zxft回复999+
迷惑你
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0 回复 2022-04-01 01:46:08
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180829mown
第10天的1400正好是50*28,所以第十天的105除以50是3天看完,前面正好有2天的 pages in book 不是5的倍数,所以第10本书看不完,就是9本
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0 回复 2021-10-08 21:44:28
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180829mown回复180829mown
错了,别看
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0 回复 2021-10-08 23:44:00
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石头人
She will read the following books for the following days. Book1 - 253 pages will take 6 days Book2 - 110 pages will take 3 days - (Total: 9 days) Book3 - 117 pages will take 3 days - (Total: 12 days) Book4 - 170 pages will take 4 days - (Total: 16 days) Book5 - 155 pages will take 4 days - (Total: 20 days) Book6 - 50 pages will take 1 days - (Total: 21 days) Book7 - 205 pages will take 5 days - (Total: 26 days) Book8 - 70 pages will take 2 days - (Total: 28 days)
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0 回复 2018-08-01 22:08:02
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默默哒
这道题目不难,就是一个个要算余数计算起来比较费时间。 如果有算的比较快的方法,请不吝赐教啊~~ 谢谢
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0 回复 2017-12-27 21:07:55
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dreamturelater回复默默哒
直接从第五天开始计算 800 能除以50 而后按照规则 剩下的五页只读一天 以此类推计算
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0 回复 2018-08-11 17:23:33
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