Réponses

2013-11-19T20:49:22+01:00
5/15-6/18
=1/3-1/3
=0

2/1-1/4
=8/4-1/7
=7/4

6/8+10/15-10/12
=3/4+2/3-5/6
=9/12+8/12-10/12
=7/12

2*1/3
=2/3

3*2/5
=6/5

12/15*5/6
=2/3*1/1
=2/3

7/10*3
=21/10

14/9*6/5
=14/3*2/5
=28/8
=7/2

2/9*4
=8/9