Réponses

2012-09-15T18:35:27+02:00

(-1/2 + 2/3) / (3/4 - 1/12 + 1/3)

= (-3/6 + 4/6) / (9/12 - 1/12 + 4/12)

= (1/6) / (12/12)

= (1/6) / 1

= 1/6