17-7=____65-60= ____70+8=____58-8=____12-9=____0+20=____12-6+9=____
11-8=____95-5=____40+9=____9+20=____14-9=____6+20=____16-8-6=____
如图,Rt△ABC的边BC绕点C旋转到CE的位置,则下列说法正确的是( )