2.5÷0.22的商用循环小数的简便写法记作 ,保留两位小数约是 .
== ÷ = (最简分数)
3﹕ ==0•375=6÷ = %
=0.4=12: =6: = %.
÷8=3: =25%= 填小数.
0.75=3: =9÷ = %.