白兔只数的与黑兔相等.白兔与黑兔的比是 ,白兔与黑兔的比值是 .
9÷ == :4== (填小数)
0.375= %== ÷16.
= %
=1:5= ÷40=40: = [填小数].
2= = = ÷ .