Réponses

2013-10-27T16:28:20+01:00
-5/6+3/4 diviser par 7/6-6/7 
=(-10/12+9/12)/(49/42-36/42)
=-1/12)/(13/42)
=-1/12*42/13
=-1/2*7/13=-7/13

3/8+5/8 /(2/3+1/6) 
=8/8/(4/6+1/6)
=1/(5/6)
=1*6/5
=6/5