1、《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+12-16-23.
2.计算:
(1)-4.2+5.7-8.4+10;
2、 (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)
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