(2011浙江省舟山,17,6分)计算:.
(2011重庆綦江,17,6分) 计算:|―3|―(―)++(-1)3
( 2011重庆江津, 21(1),6分)( )-1-∣-2∣+2sin30º +()º
(2011浙江义乌,17,6分)(1)计算: ;
(2011四川内江,17,7分)计算:
(2011四川广安,21,7分)计算: