2014 AMC 8 第 3 题
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所有题目均经美国数学协会（MAA）官方合法授权使用。
3.
Isabella 有一周时间为学校作业读完一本书。前三天她平均每天读 页，接下来三天平均每天读 页。最后一天她读了 页读完这本书。这本书有多少页？
Isabella had a week to read a book for a school assignment. She read an average of pages per day for the first three days and an average of pages per day for the next three days. She then finished the book by reading pages on the last day. How many pages were in the book?
答案：B
小提示：
将每段平均数转换成总页数
Convert each average into a total number of pages.
大提示：
将前三天、接下来三天和最后一天相加
Add the first three days, next three days, and last day.
解答：
前三天 Isabella 读了 页。
接下来三天 Isabella 读了 页。
因此她一共读了 页。
所以正确答案是 B。
During the first three days, Isabella read pages.
During the next three days, Isabella read pages.
Therefore, she read a total of pages.
Thus, B is the correct answer.
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