> 数学 >
9+99+999+9999+99999+999999+9999999+99999999=( )
人气:139 ℃ 时间:2019-12-11 02:00:45
解答
9+99+999+9999+99999+999999+9999999+99999999+999999999
=10-1+100-1+1000-1+10000-1+……+1000000000-1
=1111111101
推荐
猜你喜欢
© 2025 79432.Com All Rights Reserved.
电脑版|手机版