2.6139.5+0.318261+2.87*26.1 简便计算

分类: 作业答案 • 2021-12-20 08:27:35

问题描述：

2.61*39.5+0.318*261+2.87*26.1 简便计算

答

2.61*39.5+0.318*261+2.87*26.1
=2.61*39.5+2.61*31.8+2.61*28.7
=2.61(39.5+31.8+28.7)
=2.61*100
=261

2.61*39.5+0.318*261+2.87*26.1 简便计算