12346^2-12345*12347分之24690=?

分类: 作业答案 • 2023-01-07 23:05:33

问题描述：

答

(12346^2-12345*13247)/24690 =[12346^2-(12346-1)*(12346+1)]/24690 =(12346^2-12346^2+1)/24690 =1/24690