(51-1)×2÷(26-1)=4米
笔直的跑道一旁插着51面小旗,它们的间隔是2m.现在要改为只插26面小旗(两端的旗子不动),间隔应改为多少米?
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笔直的跑道一旁插着51面小旗,它们的间隔是2米.现在要改为只插26面小旗,间隔应改为多少米?
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