在方格纸上画出图形B和图形C.①图形A向下移动3格得到图形B.②图形A绕点0顺时针方向旋转90°得到图形C.
= :24=5:8= :40= %
3÷ ==0.75=6: = %
3÷ ==0.6=6: = %.
3:5==9: == .
=0.375=12÷ = %=0.45= %= ÷ .