简便计算41.28.1+111.25+53.7*1.9急待解决.

分类: 作业答案 • 2021-11-29 10:22:20

问题描述：

简便计算41.2*8.1+11*1.25+53.7*1.9急待解决.

答

41.2*8.1+11*1.25+53.7*1.9
=41.2*8.1+11*1.25+(41.2+12.5)*1.9
=41.2*8.1+41.2*1.9+11*1.25+12.5*1.9
=41.2*(8.1+1.9)+12.5*(11+1.9)

简便计算41.2*8.1+11*1.25+53.7*1.9急待解决.