1.994*19951995-1.995*19941994这道题的简便运算怎么做
问题描述:
1.994*19951995-1.995*19941994这道题的简便运算怎么做
答
1.994*19951995-1.995*19941994
=1.994*1995*10001-1.995*1994*10001
=1.994*1995*10001-1995*1.994*10001
=0