计算:.
计算:
计算: (1) (2) (3)(―)2+(―1)101―0.25+()2÷(―)3÷ (4)(-1+1.75-1)×8÷(-1)
计算下列各题 (1)-27-(-12); (2); (3)(-12)÷4×(-6)÷2; (4).
计算: (1); (2); (3); (4).
计算: (1)-4÷4×=_____; (2)-2÷1×(-4)=______.