16:20=32:______=______÷10=4( )
16:20=32:______=______÷10=4( )
15:______=______÷______=(  
21÷______=( )16
______÷______=0.8=28( )
______:______=0.75=12÷______=(
______÷4=9( )=0.75
______:20=20( )
0.375=______÷16=______:8=12( )
3÷______=______÷24=12( )
32平方分米=______平方米 4立方米25立方
24:______=______:24=0.375=( )16
3.5时=______时______分 20升50毫升=______毫升.