6.596596…是 循环小数,用简便方法记作 ,把它保留两位小数是 .
÷ = :16=5÷ = %=0.25.
0.8=12÷ = :10= %
÷ =8﹕ = ﹕15==.
%=15÷ ==0.3: =0.75= 折= (填成数).
÷ ==.