计算: 2 - 2 - 2 cos 60 ° + | - 12 | + ( π - 3 . 14 ) 0 .
计算: (1)(2) (3)(4)
计算:(每小题4分,共8分) (1); (2)
计算:
计算: |-4|-(2-)0+
.计算:-2+(π-1)0+tan60°-;