问题
解答题
0.9+9.9+99.9+999.9+9999.9+99999.9.
答案
0.9+9.9+99.9+999.9+9999.9+99999.9,
=(1-0.1)+(10-0.1)+(100-0.1)+(1000-0.1)+(10000-0.1)+(100000-0.1),
=111111-0.6,
=111110.4.
0.9+9.9+99.9+999.9+9999.9+99999.9.
0.9+9.9+99.9+999.9+9999.9+99999.9,
=(1-0.1)+(10-0.1)+(100-0.1)+(1000-0.1)+(10000-0.1)+(100000-0.1),
=111111-0.6,
=111110.4.