3时整,时针与分针成 度,是 角.6时整,时针与分针成 度,是 角.
1÷ =0.125= :16== %
÷0.8= :16==0.75= %
0.35== :20= %
= %= :4=.
12÷ =0.75= :32= :20= %= 折.