Bonsoir, j'ai besoin d'aide : Calculer et donner un résultat simplifié le plus possible :

1. -8/9 + 20/9
2. 12/5 - 1/15
3. -8/3 + -1/2
4. 4/7 - 2
5. 13/12 - 10/9
6. -2/3 - -8/3
7. 13/12 - 5/6 + 1/3
8. -5/4 * 3/7
9. 5/-42 * -7/3 * -12/25
10. -14/27 * -9/7
11. 12 * 5/36
12. 5/8 * 3/2 + 11/16

Merci à ceux qui vont m'aider

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