填空( )+( )=( ) ( )+( )=( )( )+( )=() ( )+( )=( )( )-( )=( ) ( )-( )=( )( )-( )=( ) ( )-( )=( )
10: = :33≈ %
: =0.75= = %.
=0.75=9: .
== ÷ == (填小数)
=0.4= ÷ =.