A、B都是非零自然数,因为A÷=B×,所以A>B. .(判断对错)
0.6= 成= : == %
3: =12÷ =0.75== %= (折数)
5: =0.25=3÷ == %.
18: ==七五折= %
÷ = :10=0.8== %