Question

Mary 准备在杂货店为五件商品付款。这些商品的价格分别为 $\$7.99$ ， $\$4.99$ ， $\$2.99$ ， $\$1.99$ ，和 $\$0.99$ 。 Mary 将用一张二十美元的纸币付款。她收到的找零约占 $\$20.00$ 的百分之几？

Mary is about to pay for five items at the grocery store. The prices of the items are $\$7.99,$ $\$4.99,$ $\$2.99,$ $\$1.99,$ and $\$0.99.$ Mary will pay with a twenty-dollar bill. Which of the following is closest to the percentage of the $\$20.00$ that she will receive in change?

$5$

$10$

$15$

$20$

$25$

答案：A

知识点：估算百分数

难度评级：1080

解答：

商品价格总计 $\$18.95,$ 所以找零为 $\$1.05.$ 它占 $\$20.00,$ 的百分比为 $\frac{1.05}{20}\cdot100\% = 5.25\%.$ 最接近的选项是 $5\%.$

所以正确答案是 A。

The prices total $\$18.95,$ so the change is $\$1.05.$ As a percentage of $\$20.00,$ this is $\frac{1.05}{20}\cdot100\% = 5.25\%.$ The closest listed percentage is $5\%.$

Thus, the correct answer is A.

2006 AMC 12B 第 4 题

答案：A

难度评级：1080

解答：

其他年份的第 4 题