一个数除以9,商是9,余数最大可能是 ,这时被除数是 .4×685的积是 位数.
=0.25= :32=8÷ = %= 折.
== ÷ = (小数)
÷5== =0.6=15÷ .
==0.25==.
15: ==36÷ = %