Sagot :
A= -5+(+4) ; 4-5=-1
B = -5 + (+9) ; 9-5=4
C= (-5) + (-5)= -10
D= (+3) + 5 = 8
B = -5 + (+9) ; 9-5=4
C= (-5) + (-5)= -10
D= (+3) + 5 = 8
Bonsoir
Calculer chaque somme
pour x = -5.
A= x + (+ 4);
A = -5 + 4
A = -1
B = x + (+9);
B = -5 + 9
B = 4
C = (-5) + x;
C = -5 - 5
C = -10
D = (+ 3) + opp(x).
D = 3 + 5
D = 8