3.6*31又五分之二+43.9*6有五分之二+6
问题描述:
3.6*31又五分之二+43.9*6有五分之二+6
答
应该是400过程 简便计算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