巧算填一填。( )+28=44+( )=7473-( )=( )-30=44
= ÷60=3: = %= (小数).
0.375= %== ÷24=15: .
= ÷ = : = %= (小数)
0.75= :16== %.
5÷ = :16= %=0.625.