来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/05/16 09:00:17
3.6*31又五分之二+43.9*6有五分之二+6
应该是400
再问: 过程 简便计算
再答: 3.6×31又2/5+43.9×6又2/5+6 = 3.6×31+3.6×2/5+43.9×6+43.9×2/5+6 =(3.6×31+43.9×6)+(3.6×2/5+43.9×2/5)+6 =(111.6+263.4)+【2/5×(3.6+43.9)】+6 = 375+2/5×47.5+6 = 375+19+6 = 400