0.9+9.9+99.9+999.9+9999.9简便计算

2024-11-22 09:29:39
推荐回答(1个)
回答1:

0.9+9.9+99.9+999.9+9999.9
=9.9+99.9+999.9+9999.9+0.9
=10-0.1+100-0.1+1000-0.1+10000-0.1+0.9
=11110.5