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?

问题描述:

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?

(51-1)×2=100(米),
100÷(26-1)=4(米),
答:间隔数应该为4米.