把米平均分成2份,每份是多少?列成乘法算式是 ;列成除法算式是 .
8÷______==2:______=0.4=______%=______成.
5:4=______÷20=______%=
9÷______=75%=______:8==______(填小数)
=______÷______=60%=______:______=______小数.
2.5:______==1.25=25÷______=______%.