计算:(1).(2)已知是锐角,且计算
计算:|-5|+22-(+1)0
(2011江苏南通,19,5分)计算:22+(-1)4+(-2)0-;
(2011四川乐山17,3分)计算:
(2011四川凉山州,18,6分)计算:
;