循环小数0.1272727…也可以记作 ,保留两位小数是 .
13.5÷ ==0.45=18: = %
÷24=0.375=15: = :16= %
3÷5== %=9: = 折.
4:5= (填小数)=0.8: .
12÷ == ;12== 小数= %