Réponse:
Exercice 1 :
a) A= 12 + 3(+2)
A= 12 +6
A= 18
b) B= 4 +4(+3) +2(+2)
B= 4 +12 +4
B= 20
c) C= -8 +2(2 +4 +3)
C= -8 +2×2 +2×4 +2×3
C= -8 +4 +8 +6
C= -8 +18
C= +10
Exercice 2 :
a) 7 × 7 × 7 × 7 × 7
= 7⁵
b) (-2) × (-2) × (-2)
= (-2)³
c) 1,3 × 1,3 × 1,3 × 1,3
= 1,3⁴
d) 10 x 10 x 10 x 10 x 10 x 10 x 10
= 10⁷