Question

一只小虫沿着数轴爬行，从 $-2$ 出发。它先爬到 $-6$ ，然后转身爬到 $5$ 。这只小虫总共爬了多少单位？

A bug crawls along a number line, starting at $-2.$ It crawls to $-6,$ then turns around and crawls to $5.$ How many units does the bug crawl altogether?

$9$

$11$

$13$

$14$

$15$

答案：E

知识点：绝对值

难度评级：770

解答：

小虫第一段爬了 $|-6-(-2)| = 4$ 个单位，第二段爬了 $|5-(-6)| = 11$ 个单位。

总距离为 $4 + 11 = 15$ 。

因此，正确答案是 E。

The bug crawls $|-6-(-2)| = 4$ units on the first leg and $|5-(-6)| = 11$ units on the second leg.

The total distance is $4 + 11 = 15.$

Thus, the correct answer is E.

2012 AMC 12A 第 1 题

答案：E

难度评级：770

解答：

其他年份的第 1 题