9+99+999+9999+99999+999999+9999999+99999999=( )
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/06/23 04:48:32
9+99+999+9999+99999+999999+9999999+99999999=( )
9+99+999+9999+99999+999999+9999999+99999999+999999999
=10-1+100-1+1000-1+10000-1+……+1000000000-1
=1111111101
=10-1+100-1+1000-1+10000-1+……+1000000000-1
=1111111101
9+99+999+9999+99999+999999+9999999+99999999=?
9+99+999+9999+99999+999999+9999999+99999999=( )
9+99+999+9999+99999+999999+9999999+99999999+999999999+999999
9+99+99+999+9999+99999+999999+999999+9999999+99999999+999999
9999999+999999+99999+9999+999+99+9=
(9+99+999+9999+99999+999999+9999999)×9×99×999×9999×99999÷900
9χ99χ999χ9999χ99999χ999999χ999999χ999999χ9999999=
9+99+999+9999+99999+999999-10000
9*99*999*9999*99999*999999=?3Q
9+99+999+9999+99999+999999=______.
999999+99999+9999+999+99+9+6怎么简算
9+99+999+9999+99999+999999-123等于多少?