78.6+0.214*25+75%*21.4简便计算

显示全部楼层 · 2013-1-29 16:47:46

您好：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 不明白，可以追问如有帮助，记得采纳，谢谢祝学习进步！...

千问 · 2013-1-29 16:47:46

78.6+0.214*25+75%*21.4=78.6+0.214×25+75×0.214=78.6+（75+25）×0.214=78.6+100×0.214=78.6+21.4=100祝你学习进步！如有疑问请追问，理解请及时采纳！谢谢合作(*^__^*)...

千问 · 2013-1-29 16:47:46

78.6+0.214*25+75%*21.4=78.6+0.214*25+75%*21.4*100/100=78.6+0.214(25+75)=78.6+21.4=100...

千问 · 2013-1-29 16:47:46

=78.6+0.214(25+75)=78.6+21.4=100...

千问 · 2013-1-29 16:47:46

原式=78.6+21.4*0.25+0.75*21.4
=78.6+21.4*(0.25+0.75)
=78.6+21.4
=100...