圆柱的侧面积是50.24dm2,底面半径是2dm,这个圆柱的体积是 dm3.
2= 2=40÷( )==9÷( )
=24÷ = %=二成= 折.
%=0.25= ÷16= :32.
÷ =0.6= :15= %= 折.
= ÷8=0.125= %=5: .