2011 AMC12B 真题

Problem 1

What is

表达式的值是多少

Problem 2

Josanna's test scores to date are , , , , and . Her goal is to raise her test average at least points with her next test. What is the minimum test score she would need to accomplish this goal?

Josanna 目前的考试分数是 90 ， 80 ， 70 ， 60 和 85 ，她的目标是靠下次考试将她的考试平均分 提高至少 分，那么她下次至少需要考多少分才能完成这个目标？ 3

Problem 3

LeRoy and Bernardo went on a week-long trip together and agreed to share the costs equally. Over the week, each of them paid for various joint expenses such as gasoline and car rental. At the end of the trip it turned out that LeRoy had paid dollars and Bernardo had paid dollars, where . How many dollars must LeRoy give to Bernardo so that they share the costs equally?

LeRoy 和 Bernardo 一起出去旅游了一周，并且商定两人均摊费用，在这一周中，他们两人都 支付了各种共同支出，例如汽油和租车费用。旅游结束后，发现 Leroy 花费 A 美元， Bernardo 花费 B 美元，这里 A<B ，那么 LeRoy 需要支付 Bernardo 多少美元才能保证他俩均 摊了费用？

2011 AMC12B