计算(1)(﹣)2(2)()3﹣(3)()2﹣(4)(π﹣3.14)0.
计算: (1)(2) (3)
计算: (1)(2) (3)(4)
计算: (+1)+(-2)+(+3)+(-4)+…+(+99)+(-100)
计算:
计算: (1) (2)