计算:
计算下列各题:(每小题3分,共6分)(1)×4+16÷(-2) (2)-6÷(-2)×
计算.(每题4分,共8分)(1)(2)
计算:(每小题4分,本题共16分)(1) (2)(3) (4)
计算:(1)-7-11-9+5 (2)×2+÷4