Question

Answer 1

Bài 3:

\(a.5+\left(-4\right)=1.\\ b.\left(-8\right)+2=-6.\\ c.8+\left(-2\right)=6.\\ d.11+\left(-3\right)=8.\\ e.\left(-11\right)+2=-9.\\ f.\left(-7\right)+3=-4.\)

Bài 4:

\(a.\left(-5\right)+5=0.\\ b.11+\left(-12\right)=-1.\\ c.\left(-18\right)+20=2.\\ d.15+\left(-12\right)=3.\\ e.\left(-17\right)+17=0.\\ f.16+\left(-2\right)=14.\)

Answer 2

Bài 2: 

a: =-12-14=-26

b: =-19-20=-39

c: =5+4=9

d: =-13-7=-20

e: =11-11=0

f: =-17-3=-20