2008 AMC 8 第 1 题

先试着解答 2008 AMC 8 第 1 题,然后核对你的答案与精心整理的解答,解答来自 LIVE by Po-Shen Loh。你也可以参加完整限时模拟考试、查看全部 2008 AMC 8 解答,或核对答案。

所有题目均经美国数学协会(MAA)官方合法授权使用。

1.

苏珊有 $50\$50 可以在嘉年华会上花。她花了 $12\$12 买食物,又花了这个数的两倍去玩游乐项目。她还剩多少美元可以花?
Susan had $50\$50 to spend at the carnival. She spent $12\$12 on food and twice as much on rides. How many dollars did she have left to spend?
1212
1414
2626
3838
5050
答案:B
知识点:钱币
小提示:
先求苏珊在游乐项目上花了多少钱,再从 5050 中减去
Find how much Susan spent on rides before subtracting from 50.50.
大提示:
$12\$12 的两倍是 $24\$24
Twice as much as $12\$12 is $24\$24.
解答:
苏珊在游乐项目上花了 2⋅12=242\cdot 12=24 美元,所以她一共花了 12+24=3612+24=36 美元。
她还剩 50−36=1450-36=14 美元。
所以正确答案是 B。
Susan spent 2⋅12=242\cdot 12=24 dollars on rides, so she spent 12+24=3612+24=36 dollars total.
She had 50−36=1450-36=14 dollars left.
Thus, B is the correct answer.
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