= ×1.5=3÷ = +.
( )×2=32( )×4=32( )×8=32
( )×2=24( )×4=24( )×8=24
( )×2=16( )×4=16( )×8=16
( )×2=8( )×4=8( )×8=8
( )×2=4( )×4=4