0.9+9.9+99.9的简便算法

2024-11-19 16:36:18
推荐回答(2个)
回答1:

0.9+9.9+99.9
=1-0.1+10-0.1+100-0.1
=1+10+100-3×0.1
=111-0.3
=110.7

回答2:

0.9*1+0.9*11+0.9*111=0.9*123=110.7