一根绳子对折三次后,从中间剪断,共剪成( )段绳子。 A. 9 B. 6 C. 5 D. 3

作者: tihaiku 人气: - 评论: 0
问题 一根绳子对折三次后,从中间剪断,共剪成( )段绳子。 A. 9 B. 6 C. 5 D. 3
选项
答案 A
解析 本题属于剪绳计数问题。一根绳子连续对折N次,从中剪M刀,则绳子被剪成 (2NXM+1)段。代入公式中可得,缇子共剪成23X1 + 1 = 9(段)。故选A。

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