Sagot :
Bonsoir,
:a)(+3) +(+12)=3+12=15
b)(+7) +(-11)=7-11=-4
c)(-5)+(+17)=-5+17=12
d)(-8)+(-7)=-8-7=-15
b)(+11) - (-19)=11+19=30
c)(-8) - (+6)=-8-6=-14
d)(-13) - (-9)=-13+9=-4
:a)(+3) +(+12)=3+12=15
b)(+7) +(-11)=7-11=-4
c)(-5)+(+17)=-5+17=12
d)(-8)+(-7)=-8-7=-15
b)(+11) - (-19)=11+19=30
c)(-8) - (+6)=-8-6=-14
d)(-13) - (-9)=-13+9=-4