(2011江苏南通,19,5分)计算:22+(-1)4+(-2)0-;
计算: (1)(2)
计算:﹣×﹣(2﹣)2.
计算:-3sin60°-cos30°+2tan45°.
计算:(1) (2)
计算20140+−sin45°+tan60°.