用简便方法计算：37.5×7.1＋500×0.29＋1.1×12.5

分类: 作业答案 • 2021-12-19 11:40:17

问题描述：

答

37.5×7.1＋500×0.29＋1.1×12.5
=（50-12.5）*7.1+50*2.9+1.1*12.5
=50*（7.1+2.9）-12.5*（7.1-1.1)
=500-12.5*6
=500-75
=425