Question

鼓手生病了，音乐会取消了。沃尔特和格蕾特必须烤出足够的饼干，共计 $216$ 块。每条黄油相当于 $8$ 汤匙。需要多少条黄油？（当然，可能会剩下一些黄油。）

The drummer gets sick. The concert is cancelled. Walter and Gretel must make enough pans of cookies to supply $216$ cookies. There are $8$ tablespoons in a stick of butter. How many sticks of butter will be needed? (Some butter may be left over, of course.)

$5$

$6$

$7$

$8$

$9$

答案：B

知识点：单位换算取整函数

难度评级：1340

小提示：

先把需要的盘数向上取整

First round the number of pans up

大提示：

将黄油汤匙数换算成条数并向上取整

Convert tablespoons of butter to sticks and round up

解答：

要做 $216$ 个饼干，他们必须做 $\left\lceil \dfrac{216}{15} \right\rceil = 15$ 盘。每盘需要 $3$ 汤匙黄油，所以所有饼干共需要 $15 \cdot 3 = 45$ 汤匙。

因此他们需要 $\left\lceil \dfrac{45}{8} \right\rceil = 6$ 条黄油。

所以正确答案是 B。

To make $216$ cookies, they have to make $\left\lceil \dfrac{216}{15} \right\rceil = 15$ pans. Since each pan requires $3$ tablespoons of butter, all the pans will need $15 \cdot 3 = 45$ tablespoons.

They will then need $\left\lceil \dfrac{45}{8} \right\rceil = 6$ sticks of butter.

Thus, B is the correct answer.

1999 AMC 8 第 19 题

答案：B

难度评级：1340

小提示：

大提示：

解答：

其他年份的第 19 题