999+9999+99999+999999
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:2024/05/31 02:08:44
999+9999+99999+999999
怎样简便运算
怎样简便运算
第一种方法:999+9999+99999+999999
=(1000-1)+(10000-1)+(100000-1)+(1000000-1)
=1000+10000+100000+1000000-1×4
=1111000-4
=1110996
第二种方法:999+9999+99999+999999
=(1000-1)+(10000-1)+(100000-1)+(1000000-1)
= (10000+100000+1000000+10000000)-4
=1110996
=(1000-1)+(10000-1)+(100000-1)+(1000000-1)
=1000+10000+100000+1000000-1×4
=1111000-4
=1110996
第二种方法:999+9999+99999+999999
=(1000-1)+(10000-1)+(100000-1)+(1000000-1)
= (10000+100000+1000000+10000000)-4
=1110996
9+99+999+9999+99999+999999-10000
9+99+999+9999+99999+999999+9999999+99999999+999999999+999999
(9+99+999+9999+99999+999999+9999999)×9×99×999×9999×99999÷900
9999999+999999+99999+9999+999+99+9=
9+99+999+9999+99999+999999+9999999+99999999=?
9*99*999*9999*99999*999999=?3Q
9+99+999+9999+99999+999999=______.
9+99+999+9999+99999+999999+9999999+99999999=( )
999999+99999+9999+999+99+9+6怎么简算
9+99+999+9999+99999+999999-123等于多少?
9+99+99+999+9999+99999+999999+999999+9999999+99999999+999999
9χ99χ999χ9999χ99999χ999999χ999999χ999999χ9999999=