Bonjour vous pourriez m’aidez au plus vite merci d’avance !!

Exo 1 a: 1/6 + 2/15
= 1x5/6x5 + 2x2/15x2
= 5/30+4/30
=9/30

B:4/5+ 11/6
=6x4/5x6+11x5/6x5
=24/30+55/30
=79/30

C:5/6+1/14
=5x4/6x4 + 1x2/14x2
=20/24+ 2/24
=22/24