计算:
(1) π 0 - 9 + ( 1 3 ) - 2 - | - 5 | ;
(2) x 2 - 16 x + 4 ÷ 2 x - 8 4 x .
(本题6分)计算: (1) (2)
计算:(本题共2小题,每题3分,共6分) (1)-23+(-37)-(-12)+45; (2)(-6)2.
计算:(每题3分,共6分) (1) (2)
(本题6分)计算:(1)(2)
(本题2分×3=6分)求下列各式中的值. ① ② ③