2016 AMC 10A 第 3 题

先试着解答 2016 AMC 10A 第 3 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 2016 AMC 10A 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。

3.

Ben 每花一美元买贝果,David 就少花 2525 美分。Ben 比 David 多付 $12.50\$12.50。他们两人在贝果店一共花了多少钱?
For every dollar Ben spent on bagels, David spent 2525 cents less. Ben paid $12.50\$12.50 more than David. How much did they spend in the bagel store together?
$37.50\$37.50
$50.00\$50.00
$87.50\$87.50
$90.00\$90.00
$92.50\$92.50
答案:C
知识点:比与比例钱币
小提示:
Ben 每花一美元,David 花 7575 美分。
David spends 7575 cents for each dollar Ben spends
大提示:
两人的差额是 Ben 花费的四分之一。
The difference is one quarter of Ben’s spending
解答:
Ben 每花一美元,David 花 7575 美分,所以两人的差额是 2525 美分。总差额为 $12.50\$12.50,也就是 Ben 花费的四分之一。
Ben 花了 12.50÷0.25=5012.50\div0.25=50 美元,David 花了 37.5037.50 美元。两人共花 87.5087.50 美元。
所以正确答案是 C。
For each dollar Ben spent, David spent 7575 cents, so the difference was 2525 cents. The total difference $12.50\$12.50 is therefore one quarter of Ben’s spending.
Ben spent 12.50÷0.25=5012.50\div0.25=50 dollars, and David spent 37.5037.50 dollars. Together they spent 87.5087.50 dollars.
Thus, the correct answer is C.
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