验算325÷4=8…5,因为4×80+5=325,所以计算结果是正确的. .(判断正误)
=8÷ = :20=0.25.
=15÷ = ÷30=七五折= %
6: == %= ÷32.
1.5=18÷ == :6= %
=3: = %= ÷20=0.75.