在0.33…,,0.31616,4.0333…,7.426426中有3个有限小数. .(判断对错)
4.25小时= 小时 分 27: =0.75=6÷ = %
=0.4==( )%.
=8÷ = %.
8:20= ÷ =4: = (填小数)= %
:20==32÷ = %= 成.