计算(1)﹣× (2)(6﹣2x)÷3.
(2011山东东营,18,3分)计算:
(20011江苏镇江,18,4分)计算:sin45°;
计算:
计算:+|-2|++(-1)2011.
(2011广东湛江21,6分)计算: