✅ Corrigé — Exercice 1

1) 3/4+5/6 = 9/12+10/12 = 19/12.
2) 7/9−2/3 = 7/9−6/9 = 1/9.
3) (5/6)×(9/10) = 45/60 = 3/4.
4) (3/4)÷(6/8) = (3/4)×(8/6) = 24/24 = 1.

✅ Corrigé — Exercice 2

1) 2⁵×2³ = 2⁸ = 256.
2) 3⁶/3² = 3⁴ = 81.
3) (2³)⁴ = 2¹² = 4096.
4) 5⁻²×5⁴ = 5² = 25.
5) (2/3)³ = 8/27.