时钟5时整,时针和分针所组成的角是 角,是 度.
8÷______==2:______=0.4=______%=______成.
5:4=______÷20=______%=
9÷______=75%=______:8==______(填小数)
=______÷______=60%=______:______=______小数.
2.5:______==1.25=25÷______=______%.