一个厚玻璃瓶的体积是3d m3,瓶里一定能装下3升水. .
== ÷9=44÷ .
=0.375= :16= %
0.6== ÷30= %
9÷ =0.75= :24= %= 折.
9÷ =0.75== :36= %