Réponses

2014-01-12T17:30:45+01:00
-5/31 x 31/10
=-5/10
=-1/2

-3.6/4.2 x 35/4
=-36/42 x 35/4
=-9/6 x 5
=-45/6

-12/25 x 45/16 x(-22)
=-3/5 x 9/4 x(-22)
=-27/20 x (-22)
=27/10 x 11
=297/10

-2/7 x -21/8= 
=1 x 3/4
=3/4