2.61乘39.5+0.318乘261+2.87乘26.1怎么简算

分类: 作业答案 • 2021-12-19 15:53:17

问题描述：

答

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