有理数的加法运算作业 姓名: 学号: 1计算:(1)3-8; (2)-4+7; (3)-6-9; (4)8-12; (5)-15+7; (6)0-2; (7)-5-9+3; (8)10-17+8;(9)-3-4+19-11; (10)-8+12-16-232计算:(1)-4.2+5.7-8.4+10; (2)6.1-3.7-4.9+1.8;3计算:(1)-216-157+348+512-678; (2)81.26-293.8+8.74+111;4计算:(1) 12-(-18)+(-7)-15; (2) -40-28-(-19)+(-24)-(-32);5计算:(1) (+12)-(-18)+(-7)-(+15); (2) (-40)-(+28)-(-19)+(-24)-(32);(3)(+4.7)-(-8.9)-(+7.5)+(-6); (4) - 1 -