2.90.45+0.294.2+0.

分类: 作业答案 • 2021-12-20 09:34:09

问题描述：

2.9*0.45+0.29*4.2+0.

答

=2.9*0.45+2.9*0.42+2.9*0.13
=2.9*(0.45+0.42+0.13)
=2.9*1
=2.9

2.9*0.45+0.29*4.2+0.