61.2*4.1-22.9怎么简便计算

分类: 作业答案 • 2021-12-19 19:31:01

问题描述：

61.2*4.1-22.9怎么简便计算

答

61.2*4.1-22.9
=61.2*4+61.2*0.1-23+0.1
=244.8+6.12-23+0.1
=244.8-23+6.12+0.1
=221.8+6.22
=228.02谢谢您了满意请采纳