如果ab+6=12.25,则a和b不成比例.A.正确 B.错误.
7÷ = :12=== (小数)= %
0.375= :8==6÷ = %
=4÷5=32: = %= 折.
=10÷ = ÷0.3=.
==12÷ =≈ (保留两位小数).