计算下列各题(每题4分,共24分) (1) – 12 -25 (2) 0 – (– 8 ) (3)12-(-18)+(-7)-15 (4)(-18)÷2÷(-16) (5) (6)
计算:(1)(2)
.(本题8分)计算:
(本题15分)计算:(1)(2)(3)
计算:
解方程:2x2-6x+1=0.