p÷3="b" p和b的最小公倍数是 ,最大公因数是 .
3÷ ==0.375= :24=24: .
=2.5:( )=125%=20÷( )=.
5: ==0.25= %
2.5÷ ==15: = %= (小数)
÷8==0.375=9÷ =; 填质数:21= + ; = × .