AMC12 2012 A

AMC12 2012 A · Q1

AMC12 2012 A · Q1. It mainly tests Fractions, Distance / midpoint.

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?

一只虫子沿着数轴爬行，从 $-2$ 开始。它爬到 $-6$，然后转身爬到 $5$。虫子总共爬了多少单位距离？

(A) 9 9

(B) 11 11

(D) 14 14

(E) 15 15

Answer

Correct choice: (E)

正确答案：（E）

Solution

Crawling from $-2$ to $-6$ takes it a distance of $4$ units. Crawling from $-6$ to $5$ takes it a distance of $11$ units. Add $4$ and $11$ to get $\boxed{\textbf{(E)}\ 15}$

从 $-2$ 爬到 $-6$ 的距离是 $4$ 个单位。从 $-6$ 爬到 $5$ 的距离是 $11$ 个单位。将 $4$ 和 $11$ 相加得到 $\boxed{\textbf{(E)}\ 15}$

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