Répondre :
A= 11-31= -20
B= -15-6= -21
C= 12-8-18+5
= 12+5 -8-18
= 17 -26 = -9
D= 4-(-7)= 4+7=11
E= -3-(+7)
= -3 +7
= 4
Nombre relatif :
A=11-31, B=-15-6, C=12-8-18+5, D=4-(-7), E=-3-(+7) ..
A= 11-31= -20
B= -15-6= -21
C= 12-8-18+5
= 12+5 -8-18
= 17 -26 = -9
D= 4-(-7)= 4+7=11
E= -3-(+7)
= -3 +7
= 4