早教吧作业答案频道 -->数学-->
900/80,940/60,700/60,870/40.用简便计算
题目详情
900/80,940/60,700/60,870/40.用简便计算
▼优质解答
答案和解析
900/80=800/80+80/80+20/80=10+1+0.25=11.25
940/60=600/60+300/60+40/60=10+5+2/3=47/3
700/60=600/60+60/60+40/60=10+1+2/3=35/3
870/40=800/40+80/40-10/40=20+2-0.25=21.75
940/60=600/60+300/60+40/60=10+5+2/3=47/3
700/60=600/60+60/60+40/60=10+1+2/3=35/3
870/40=800/40+80/40-10/40=20+2-0.25=21.75
看了 900/80,940/60,...的网友还看了以下：