按颜色分:( )+( )=( )( )+( )=( )按大小分:( )+( )=( )( )+( )=( )
÷40=20: =0.8= : .
3÷ == :12=六成= %
0.25= ÷8== : .
40: =8:10= /5= (填小数)
=18: = ÷40= [填小数].