Réponses

2014-09-17T18:44:46+02:00
= 7 / 12 + 25 / 18
= 126 / 216 + 300 / 216
= 426 / 216
= 71 / 36

= 7 / 12 - 25 / 18
= 126 / 216 - 300 / 216
= - 174 / 216
= - 29 / 36

= 7 / 12 x 25 / 18
= 175 x 216

= 7 / 12 : 25 / 18
= 7 / 12 x 18 / 25
= 126 / 300
= 21 / 50