Réponses

2014-05-21T21:36:35+02:00
15/7 x 21/25 + 7/10
= 315/175 + 7/10
= 315 x 10 / 175 x 10 + 7  x 175 / 10 x 175
= 3150/1750 + 1225/1750
= 4375/1750
= 875 x 5 / 875 x 2
= 5/2
  • Utilisateur Brainly
2014-05-21T21:38:50+02:00