一本书有a页,小华每天看8页,看了x天,还剩 页没看,如果,a=120,x=6,还剩 页没看.
0.75= :28== %=24÷ .
18÷ = ÷25=0.6==.
=0.25==27÷ = ÷48.
12: == : = :12.
=15÷ = ÷30=七五折= %