23000m2= hm2 4.06hm2= m2 4.8km2= hm2.
27: =45÷30== %.
甲数除以乙数商是3.6,那么乙数与甲数的比是 : .
4.25小时= 小时 分27: =0.75=6÷ = %
=0.4==( )%.
=8÷ = %.