2013 AMC 8 第 22 题
先试着解答 2013 AMC 8 第 22 题，然后核对你的答案与视频与精心整理的解答，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 2013 AMC 8 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。
22.
用牙签搭成一个长 根牙签、高 根牙签的网格。一共用了多少根牙签？
Toothpicks are used to make a grid that is toothpicks long and toothpicks high. How many toothpicks are used altogether?
答案：E
小提示：
分别统计竖直牙签和水平牙签
Count vertical and horizontal toothpicks separately.
大提示：
一个 乘 的网格有 条竖直线和 条水平线
A by grid has vertical lines and horizontal lines.
视频讲解：
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文字解答：
一个 乘 网格有 条竖直网格线，每条由 根牙签组成；还有 条水平网格线，每条由 根牙签组成。
因此牙签总数为
所以正确答案是 E。
A -by- grid has vertical grid lines, each made of toothpicks, and horizontal grid lines, each made of toothpicks.
Therefore the total number of toothpicks is
Thus, E is the correct answer.
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