7.26是由 个1、 个0.1和 个0.01组成的.
4.25小时= 小时 分27: =0.75=6÷ = %
=0.4==( )%.
=8÷ = %.
8:20= ÷ =4: = (填小数)= %
:20==32÷ = %= 成.