Réponse :
EX6 simplifier au plus sans calculatrice
A = (2/3)⁰ = 1
B = (- 1)⁵ = (- 1) x (-1) x (-1) x (-1) x (- 1) = - 1
C = 2 - 3² = 2 - 9 = - 7
D = 2 x 5³ = 2 x 5² x 2 = 2 x 25 x 5 = 50 x 5 = 250
E = 2⁻¹ + 5⁻¹ = 1/2 + 1/5 = 0.5 + 0.2 = 0.7
Explications étape par étape