99.9+O.2+0.9+9.9+0.2+999.9

分类: 作业答案 • 2022-01-09 18:04:21

问题描述：

99.9+O.2+0.9+9.9+0.2+999.9
=
=
=
=
=
=

答

99.9+0.2+0.9+9.9+0.2+999.9
=(99.9+0.1)+(0.1+0.9)+(9.9+0.1)+(0.1+999.9)
=100+1+10+1000
=1111