Réponses

2013-12-30T17:30:03+01:00
3-3/5 = (3/1)-(3/5)= 12/5= 2,4
2013-12-30T17:44:29+01:00
A=3-3/5

d'abord, 3=15/5
donc:
15/5-3/5=12/5