Réponses

Meilleure réponse !
2014-05-26T19:45:05+02:00
43/10 - 5/10
= 38/10
= 2 x 19 / 2 x 5
= 19/5

6/5 + 2/15

= 6 x 3 / 5 x 3 + 2/15
= 18/15 + 2/15
= 20/15
= 5 x 4 / 5 x 3
= 4/3