Réponses

2012-09-10T20:18:01+02:00

c=5/3-2/3:5/6

= 5/3 - 2/3 * 6/5

= 5/3 - 12/15

= 25/15 - 12/15

= 13/15

 

d=-13/7+3/7:5/3

= -13/7 + 3/7 * 3/5

= -13/7 + 9/35

= -65/35 + 9/35

= -56/35

= -(7*8)/(7*5)

= -8/5

 

en espérant t'avoir aidé.