999999+99999+9999+999+99+9+6怎么简算
问题描述:
999999+99999+9999+999+99+9+6怎么简算
答
999999+99999+9999+999+99+9+6
=(999999+1)+(99999+1)+(9999+1)+(999+1)+(99+1)+(9+1)
=1111110