78.6+0.21425+75%21.4简便计算

分类: 作业答案 • 2021-12-28 18:34:18

问题描述：

78.6+0.214*25+75%*21.4简便计算

答

78.6+0.214*25+75%*21.4
=78.6+0.214*25+0.75x100x0.214
=78.6+0.214x(25+75)
=78.6+0.214x100
=78.6+21.4
=100

78.6+0.214*25+75%*21.4简便计算