Bài 1: Tính
1)-(-8)-9+10+(-14)+(+12)
2)-14+(-13)-(-9)-5
3)-9+17-18+12-23
4)-12+(+14)-17+(-3)
5)-(-17)-(+15)+18-20
6)11-15+13-17+8-4
Bài 8: Bỏ ngoặc rồi tính
1)(-5)+(-18)-(+9)+(+3)
2)-11-(-15)+(-13)-(+9)+(-5)
3)(-4)-(-8)+(-15)+(-10)
4)-(-4)-(-12)-(+5)+19
5)-(+7)-(-12)+(-9)+(+10)
6)-(28-30+4)
7)16-(-3)+(-5)-(+7)+12
8)13-(17-15-3)+(-4+8-9)
Bài 1:
1: \(=8-9+10-14+12=9-2=7\)
2: \(=-14-13+9-5=-18-5=-23\)
3: \(=8-18-11=-10-11=-21\)
4: \(=-12+14-17-3=-32+14=-18\)
5: \(=17-15-2=0\)
6: \(=-4-4+8-4=-4\)