999又8/9+99又8/9加9又8/9加1/3简便运算
问题描述:
999又8/9+99又8/9加9又8/9加1/3简便运算
答
999又8/9+99又8/9加9又8/9加1/3
=(999+99+9)+(8/9+8/9+8/9+3/9)
=999+99+9+3
=999+1+99+1+9+1
=1110
答
都加1 后在减1
答
999又8/9+99又8/9加9又8/9加1/3
=1000-1/9+100-1/9+10-1/9+1/3
=1110-1/3+1/3
=1110