Question

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)

Answer 1

Bài 8:

1: \(=-5-9+\left(-18\right)+3=-14-15=-29\)

2: \(=-11+15-13-9-5\)

=4-13-9-5

=-9-9-5

=-18-5=-23

3: \(=-4+8-15-10=4-25=-21\)

4: \(=4+12-5+19=16-5+19=30\)

5: \(=-7+12-9+10=22-16=6\)

6: \(=-28+30-4=2-4=-2\)

7: \(=16+3-5-7+12=28+3-12=16+3=19\)

8: \(=13-\left(-1\right)+\left(-5\right)=8+1=9\)