(1)计算: ( 3 + 1 ) 0 + | - 2 | - 3 - 1
(2)解不等式组: 2 x + 1 < x + 5 4 x > 3 x + 2 .
计算: (1) (2)
计算:+ .
计算题: (1)﹣(﹣18)+12﹣15+(﹣17) (2) (3) (4)
计算: (1)-2+6÷(-2)×; (2)
解方程或不等式:(每小题4分,共8分) (1); (2)解不等式:5(x﹣2)﹣2(x+1)>3