计算: - 1 4 - | 3 - 1 | + ( 2 - 1 . 414 ) 0 + 2 sin 60 ∘ - - 1 2 - 1
计算: (1) (2)
(本题满分8分,每题4分)计算: (1)+2sin45°- (2)2(a+1)-(3-a)(3+a)-
计算(每小题3分,共9分) (1) (2)-(x-1)(x-2) (3)用简便方法计算:20142﹣4030×2014+20152
(每小题3分,共6分)计算: (1) (2)
计算或化简 (1) (2)