网址:http://m.1010jiajiao.com/timu3_id_693459[举报]
计算:
(1)15+(-22)
(2)(-13)+(-8)
(3)(-0.9)+1.51
(4)
(3)(-0.9)+1.51
(1)15+(-22) (2)(-13)+(-8) (3)(-0.9)+1.51